screwdriver bits types

Interchangeable Head. They are sometimes called one-way clutch screws, but should not be confused with true "clutch" screws. Type G resembles a butterfly, and lacks the center "knot". They come in three main sizes – #1, #2 and #3 (#2 is again the most common). The radial "height" of each arris is reduced, compared to a six-point, although their number is doubled. They can potentially give the screwdriver bit double the life of either an insert bit or a power bit at much less than double the cost. The line screw drive is a Japanese system with male, female and female tamper-resistant screw configurations. Also known as “Snake Eyes,” Spanner Bits fit into their respective screws via two small round symmetrical pins. The Pozidriv was patented by GKN Screws and Fasteners in 1962. All screwdriver bits have what is known as a ¼” hex shank, and are able to fit into any drill with either a keyed, keyless, or ¼” (6.35mm) hex drive chuck. Torq-set is a cruciform screw drive used in torque-sensitive applications. They are a lot more reliable than Phillips and slotted bits if you are trying to avoid cam-out, but in modern times are slowly being replaced by hex bits. We also take a look at the huge range of screwdriver bits and kits that are available today and how these can save time on many DIY jobs and space in the toolbox. Originally to make the manufacture of the screws practical using cold forming of the heads,[13]:79–81 this taper provides two other advantages which have served to popularize the drive: it makes inserting the tool easier, and tends to help keep the screw on the tool tip without the user needing to hold it there.[13]. ... Other than the bit type, another consideration is the screwdriver bit material. Flat-blade jeweler's screwdrivers and the tips found in 1⁄4-inch or 6.4-millimeter drive sets are generally hollow-ground. They are found on IBM computers, as well as Nintendo and Sega systems and their game cartridges. The ASTER recess was designed by LISI Aerospace[46] to provide a more reliable solution than the hexagonal recess for assemblies of composite structures on aircraft. It is a later development by the same company. [19] and "Type Z" in ISO documents. When using high-torque fastening tools like cordless impact drivers, it is important to purchase screwdriver bits that are rated for this type of use so as to ensure the bit’s longevity. Proprietary examples include T-Groove, Slot-Lok, Pentagon, Tork-Nut, T-Slope and Spanner designs. Sometimes these sizes will be slightly small for the screw at hand. [citation needed] Robertson spent a small fortune buying back the rights, and subsequently refused to allow anyone else to make the screws under license. When a Phillips is Not a Phillips Plus So Much More! The socket-headed Robertson screws are self-centering, reduce cam out, stop a power tool when set, and can be removed if painted over or old and rusty. [15] However, a 1949 refinement to the original design described in US Patent #2,474,994[16][17][18] describes this feature. The most common sizes in use for consumer electronics are DCT-20 and DTC-27. An earlier patent covering both square-socket- and triangle-socket-drive wood screws, U.S. Patent 161,390, was issued to one Allan Cummings of New York City on March 30, 1875. The US military's M17 and M18 service pistols (variants of the SIG Sauer P320) use spanner screws to dissuade disassembly of the handgun beyond normal field maintenance except by the authorized armorer, they have also been used previously for reinforcement screws on the M14 in order to secure the front locking tab on the magazine well, and are commonly found on the recoil lug of surplus rifles. Slotted/Phillips (as opposed to slotted/pozidriv) heads occur in some North American-made switchgear. The Type II (Conical/Connie) design adds a conical cup that receives a centering pin on the driver, improving the alignment of the driving tool to the fastener recess. They are intended to be tightened and loosened by hand, and not found in structural applications. This design also provides a greater driving surface and decreases wear. Informationen, die über diese Service Cookies gewonnen werden, können möglicherweise auch zur Seitenanalyse weiterverarbeitet werden. Philips bits look very much like a cross, and come in a range different sizes – #000, #00, #0, #1, #2, #3 and #4 (#2 is the most common). Phillips drive bits are often designated by the letters "PH",[9] plus a size code 0000, 000, 00, 0, 1, 2, 3, or 4 (in order of increasing size); the numerical bit size codes do not necessarily correspond to nominal screw size numbers.[3][12]. [37][38][39] Robertson's refusal to license his screws prevented their widespread adoption in the United States, where the more widely-licensed Phillips head gained wider acceptance. The main advantage to this drive system is that almost all of the turning force is applied at right angles to the fastener spline face, which reduces the possibility of stripping the fastener. They are also known as "game bit screws", due to their use on some video game consoles. Each screwdriver bit has different types of shanks and tips to suit different screws and applications – all are described in depth below. Tri-Lobular Bits are also known as TP3® Bits, and are becoming increasingly common on consumer electronics, security doors and many other tamper-proof applications. The slotted screw is commonly found in existing products and installations, along with use in simple carpentry work and in applications where minimal torque is needed. Compared to an Allen drive, Bristol drives are less likely to strip for the same amount of torque; however, the Bristol drive is not much more strip-resistant than a Torx drive. If you have an impact driver, you should use impact-rated bits as other bit … These sizes do not necessarily describe a particular dimension of the drive shape, but rather are arbitrary designations. British Aerospace and Airbus are also users of this fastener. A new variation of the Robertson drive is the Nüvo Drive System, in which the screws are compatible with Robertson drive tools, but the screws have rounded lobes that, when used with Nüvo drivers, "dramatically reduce wobbling and stripping out, enabling single-handed operation". Special sockets called impact sockets are available for high torque fastening applications. A hex screw drive uses six-sided fastener heads, and the fastener is known as a hex head cap screw. Key-Rex screws are another design, and are used in such things as ballot boxes and bank vaults.[42]. The 12-spline flange screw drive has twelve splines in the fastener and tool. They are security bits, and come in sizes #4, #6, #8 and #10. The screw drive refers to the recess (the shape in the screws head or groove) which the screwdriver needs to fit to apply the correct torque. To prevent slipping and/or stripping of the screw head, apply ample pressure to the bit and keep it perfectly in-line with the screw. [9][22], The JIS B 1012 is commonly found in Japanese made equipment, such as cameras and motorbikes. This provides a set of one handle and several bits that can drive a variety of screw sizes and types. A U-drive screw has a helical thread with an angle acute enough to be driven by a hammer, and thus has a domed head with no means of turning it. Screwdriver Bits. [citation needed] The term "inbus" is derived from Innensechskant Bauer u. Schaurte (German: "Inner 6-edge Bauer & Schaurte"), analogous to the US term "Allen key". [9][10] Phillips is credited with forming a company (Phillips Screw Company), improving the design, and promoting the adoption of his product. "JIS" standardized cruciform-blade screwdrivers are available for this type of screw, and should always be used to avoid head and driver damage. Slot screws are also used in the restoration of antique furniture, vehicles, and equipment. It is often found in marine hardware and requires a Frearson screwdriver or bit to work properly. A combined slotted and Torx drive screw was used in electronics manufacturing. Pozidriv and Supadriv screws are slightly different in detail; the later Supadriv allows a small angular offset between the screw and the screwdriver, while Pozidriv has to be directly in line. Screwdriver bits from Grainger can drive screws and other fasteners by hand or with a cordless screwdriver or drill. It is a tamper-resistant style of screw drive, and is most frequently used for aerospace applications. When Henry Ford tried out the Robertson screws, he found that they saved considerable time in Model T production, but when Robertson refused to license the screw design, Ford realized that the supply of screws would not be guaranteed and chose to limit their use in production to Ford's Canadian division. At least one mechanical method of temporarily holding a slotted screw to a matching screwdriver is available, the Quick-Wedge screw-holding screwdriver, first manufactured by the Kedman Company in the 1950s.[5]. TP3 (sometimes referred to as tri-lobe or tri-lobular) uses a Reuleaux triangle-shaped recess in the screw head, to make it semi-secure because it cannot be driven by a flat-blade screwdriver[78] and is not readily driven, as Tri-angle is, by hex keys. As the name suggests, Tri-Wing bits have three evenly spaced slots and are predominantly used on consumer electronics to discourage home repair. There are various other ways to categorize screw drives. The slot was closed on the ends to prevent the flat-blade tool from slipping out sideways and damaging nearby electronics. [44] Apple's first use of the pentalobe drive was in mid-2009 to secure the battery in the MacBook Pro. Created by Henry F. Phillips, the Phillips screw driver was purposely designed to cam-out when the screw stalled, to prevent the fastener damaging the work or the head, instead damaging the driver. Despite the similar naming scheme to metric fasteners, there is no correlation between the name of the size and the dimensions of the tool. Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. A pentagon screw drive uses five-sided fastener heads, and the fastener is known as a penta screw or penta bolt. Other combinations are a Phillips and Robertson, a Robertson and a slotted, a Torx and a slotted and a triple-drive screw that can take a slotted, Phillips or a Robertson. Generally there are eight types of screw driver bits of various shapes and for various types. However, as with other clever drive types conceived and patented in the 1860s through 1890s, it was not manufactured widely (if at all) during its patent lifespan due to the difficulty and expense of doing so at the time. For this reason, cruciform-slotted along with drives have replaced the slot drive in numerous applications. In Japan, the male sizes are often designated as DTC-20, DTC-27, DTC-40 (discontinued) and DTC-45 corresponding to a respective screw head size of 3.2mm, 4.6mm, 6.4mm and 7.7mm; with the size of the screw measured across the widest portion of the mating part of the head. The pentalobe screw drive (often mistaken for 5-point torx screw drives) is a five-pointed tamper-resistant system being implemented by Apple in its products. [citation needed] It was patented in the United States in 1913 by Dwight S. Goldwin and put into production by the Bristol Wrench Company.[60][61]. Was this guide helpful? We also take a look at the various types of screwdriver design and operation that includes the ratchet, impact driver, nut driver and the insulated VDE screwdrivers for electrical work. Steel bits Steel is the most widely used material for bits as it offers good value for money (provided the bits are used correctly). The description of the Pozidriv head applies also to Supadriv. The tool recess is a perfect, sharp cross, allowing for higher applied torque, unlike the rounded, tapered Phillips head, which can cam out at high torque. The toughest bits available, these withstand the shock and twisting force of impact drivers.. Hex shank bits (also known as insert bits) are used with a bit adapter in power tools.. Hex shank bits for power tools have a groove in the shank and fit directly into power tools without an adapter. The tool used to drive a slot is called a common blade, flat-blade, slot-head, flat-tip[3] or flat-head / flathead[4] screwdriver. Triple-square drive fasteners have been used in high-torque applications, such as cylinder head bolts and drive train components. With 105 total 1" screwdriver bits and 22 precision bits, you will be ready for anything. An external Torx screw has a projecting head in the shape of a Torx screwdriver bit (instead of a standard recessed cavity); a Torx socket is used to drive it. [9] The original patent[11] expired in 1966, but the Phillips Screw Company continued to develop improved designs.[9]. [51], The Phillips/square screw drive, also known as the Quadrex, Pozisquare screw drive, is a combination of the Phillips and Robertson screw drives. Tamper-resistant versions with a pin in the recess are available. There are probably still more slotted or ‘flathead’ screws and screwdriver bits in overall circulation, but those are often a result of older standards not being updated, and are largely seen as something of a legacy design by modern standards. https://en.wikipedia.org/w/index.php?title=List_of_screw_drives&oldid=998855682, Articles with unsourced statements from December 2017, Articles with unsourced statements from February 2007, Articles with unsourced statements from July 2017, Articles with unsourced statements from May 2012, Articles with unsourced statements from February 2011, Articles with unsourced statements from June 2010, Articles with unsourced statements from May 2010, Articles with unsourced statements from February 2017, Creative Commons Attribution-ShareAlike License, This page was last edited on 7 January 2021, at 09:37. It can be turned with an adjustable wrench, combination wrench and 6- or 12-point sockets. In many countries it is commonly but incorrectly called "imbus". The bottom of the recess is flat, and the point of the driver has to be blunt. They are difficult to remove with conventional tools because the slot is designed to cause cam out when even minimal torque is applied in the direction to unscrew it. Though the practice of using screws with slotted drives is on the decline because the screwdriver bits slips out of the slot, particularly when you are applying heavy torque to really tighten down (or loosen, for that matter) these types of screws. See § External Torx. Torx ttap is a version of Torx that reduces wobbling between the fastener and the tool, and is backward compatible with standard hexalobular tools. [13]:85[14] Extensive evidence is lacking for this specific narrative, and the feature is not mentioned in the original patents. 2. They aren’t often seen in applications where a power tool would be used however as the driver bit tends to slip out of the head and can potentially damage the surrounding material. The head has a slight taper which makes inserting the bit and keeping the screw on the bit a great deal easier. While a standard Phillips or Robertson tool can be used, there is also a dedicated tool for it that increases the surface area between the tool and the fastener so it can handle more torque. The most important technique is to use the right size screwdriver. The double-square drive is two squares superimposed at 45° rotation, forming an 8-pointed star. The internal-wrenching square socket drive for screws (as well as the corresponding triangular socket drive) was conceived several decades before the Canadian P. L. Robertson invented the Robertson screw and screwdriver in 1906 and received the Canadian patent in 1907 (CA103387, U.S. Patent CA103387A) and US patent 1911 (U.S. Patent 1,003,657) for a manufacturing machine. Power Bits – fit directly into the power tool or quick change chuck for improved concentricity and easier clearance. They are available in sizes #1 through to #4. Spline drives were specified for 5, 6.3, 8, 10, 12, 14, 16, and 20 mm size screws. Other names for these types of drives are cross recessed, cross-head, cross tip, and cross-point. It is essential that you learn the different screwdriver types and screw head types and sizes, given how often you will need to use a screwdriver. This type of screw head is commonly used in the manufacture of mobile homes and recreational vehicles. Drive blades are about equal thickness. The following heads are categorized based on frequency, with some of the less-common drives being classified as "tamper-resistant". For its designation are used the letters TR, which stands for Torx Tamper Resistant. There has long been a popular belief that this was a deliberate feature of the design, to assemble aluminium aircraft without overtightening the fasteners. Both the tool and the socket have a slight taper. [49] Torx is very popular in the automotive and electronics industries because of resistance to cam out, and extended bit life, as well as reduced operator fatigue by minimizing the need to bear down on the drive tool to prevent cam out. If we want to do things properly we need to use proper screws and therefore we need to use the appropriate screwdriver as well. Most people don’t know much about screwdriver types and their uses but that knowledge is essential for success in every project. Phillips. External drives are characterized by a female tool and a male fastener. Choose from our selection of slotted screwdriver bits, including over 175 products in a wide range of styles and sizes. Each has its own advantages, but the one thing they all have in common is that they apply torque without the need for manual strength. The main practical difference is in driving screws into vertical surfaces: that close to a near vertical surface to drive the screws into the drivers, Supadriv has superior bite, making screwdriving more efficient, with less cam out. Live Chats) auf der Webseite zur Verfügung zu stellen. The name derives from overlaying three equal squares to form such a pattern with 12 right-angled protrusions (a 12-pointed star). An advantage of external drive fasteners is that they lack a recess in the head, which can collect water, dirt, or paint, which can interfere with later insertion of a driver tool. Sizes range from T1 through to T20. [citation needed] McDonnell Douglas also used this as a primary fastener on its commercial aircraft. Pozidriv and Phillips appear broadly interchangeable, but may cause damage if incorrectly used. The applicable standards that govern the Torq-set geometry are National Aerospace Standard NASM 33781 and NASM 14191 for the ribbed version. A further improvement over Torx Plus.[50]. Since five is an odd number, it cannot be turned by open-end or adjustable wrenches, which have parallel faces (and thus require a fastener with an even number of sides). The project bit and driver set features 12 different bit types, each in a full range of sizes. Impact-rated bits. Screwdriver is invented in the 15th century and through the centuries it became the essential tool in every toolbox. It is achieved overlaying 4 equilateral triangles, each one rotated 30° over the previous one. The following are screw drives based on a cruciform shape; i.e., a cross shape. The fasteners are commonly called "line head screws". It was designed to permit increased torque transfer from the driver to the bit compared to other drive systems. [20][21] It was designed to allow more torque to be applied and greater engagement than Phillips drives. While a Phillips screwdriver has slightly tapered flanks, a pointed tip, and rounded corners, a Pozidriv screwdriver has parallel flanks, a blunt tip, and additional smaller ribs at 45° to the main slots. Contact Us Call our Service Hotline or use our contact form. Screwdriver Types, find quality Screwdriver Types products,Screwdriver Types Manufacturers, Screwdriver Types Suppliers and Exporters at ZHIDA Hardware CO.,LTD. Torx Plus is an improved version of Torx that extends tool life even further and permits greater torque transfer compared to Torx. One way is by shape of the fastener screw drive: "Frearson" redirects here. True tamper-resistant screw drives include the breakaway head and one-way screw drives. Some of these types are specified in ISO 4757, Cross recesses for screws. (The idea is that first screwdriver out of the toolbox is used, and the user does not have to waste valuable time searching for the correct driver). The triple-square, also known as XZN, is a type of screw drive with 12 equally spaced protrusions, each ending in a 90° internal angle. It is ideal to have a drill with a variable speed trigger, as it is extremely helpful for an accuracy standpoint if your drill can reach very slow speeds. Insert bits have an extremely short shank, cost the least out of all screwdriver bits, and are designed to clip into a magnetic bit holder. Torq bits are very similar to phillips bits, but each arm of it’s cross-like shape is offset from it’s opposite. This can also prevent attempts at turning the screw with a small flat-bladed screwdriver. Instead, a one-way screw can be removed by drilling a hole through the head of the screw and inserting a screw extractor. [26], Phillips II recesses are compatible with Phillips drivers, but have a vertical rib in between the cruciform recesses that interacts with horizontal ribs on a Phillips II driver to create a stick-fit, and to provide anti cam-out properties (the ribs are trademarked as "ACR" for Anti Cam-out Ribs). The Supadriv (sometimes spelled incorrectly as "Supadrive") screw drive is very similar in function and appearance to Pozidriv. The Pozidrive screw driver is an improved version of the Phillips screw drive with an additional four contact points. There are specialty fastener companies that make unusual, proprietary head designs, such as Slot-Lok and Avsafe. A thumbscrew is a type of screw drive with either a tall head and ridged or knurled sides, or a key-like flat sided vertical head. Instead of being solid, they have a hole in their centre to accommodate security screws, and to prevent the use of standard torx bits. Linear broaching to cut corners into a drilled hole (similar to the action of a mortising machine for woodworking) has also been used (less commonly) over the decades. Sometimes referred to as a screw gun, power screwdriver, or automatic screwdriver, these tools can make tough jobs a snap, especially when working on damaged heads. Robertson, a Canadian. Standard 12-point hex socket bits and wrenches fit these screws. Find Specialty Screwdriver Bits at MSC Industrial Supply, serving the metalworking, safety, and MRO industries for over 75 years Slotted screwdriver bits . Moreover, it cannot be turned by typical consumer- and professional-grade socket drivers, which possess either six or twelve points (neither of which are multiples of five). Today, different types of bits are used for this type of screwdriver. Penta nut security fasteners also are available, which can only be driven by specialized five-sided socket drivers. The Reed & Prince Mfg. A Phillips screw head is significantly different from a PoziDriv;[9] see § Pozidriv section below for details. The bits are likely to be made of different materials, ultimately affecting their durability and where best to use them. Other names for these types of drives are cross recessed, cross-head, cross tip, and cross-point. They resist cam-out better than Phillips or slotted bits, and were specifically designed with this purpose in mind due to the improvements in torque-limiting automatic screw driving tools. [31], A Robertson, also known as a square[35] or Scrulox[36] screw drive is specified as ANSI Type III Square Center and has a square-shaped socket in the screw head and a square protrusion on the tool. Combination Robertson/Phillips drives are often used in the electrical trade, particularly for device and breaker terminals, as well as clamp connectors. Be sure to check the length, point size and diameter to ensure compatibility for your project. While each has its own driver,[26] the same screwdriver heads may be used for both types without damage; for most purposes it is unnecessary to distinguish between the two drives. For this reason Bristol screw drives are often used in softer, non-ferrous metals. Metric sizes of the hex socket are defined by ISO 4762 (socket head cap screws), ISO 4026 (socket set screws with flat point), ISO 4027 (socket set screws with cone point), ISO 4028 (socket set screws with dog point), and ISO 4029 (socket set screws with cup point). [81] These are most frequently driven into plastic. [citation needed], The Frearson screw drive, also known as the Reed and Prince screw drive, and specified as ANSI Type II Cross Recess, is similar to a Phillips but the Frearson has a sharp tip and larger angle in the V shape. [citation needed]. Insert Bits – compact bits that are economical, change over quickly and require less storage space. It can also sometimes be removed by attaching a precision drill chuck tightly to the screw head, in a manner similar to removing screws that have broken heads.[62]. The screwdriver is a necessary and required tool not just at home but also for those of you who work in the set decoration, construction, or scenic department in the film and television industry. The ribbed version is also known as ACR Torq-set.[73]. Hex shanks breakaway bolts, breakaway nuts of similar design are available in sizes #.! Are most commonly encountered in the electrical trade, particularly for device and breaker terminals, well! Twin hole wheels and seats spline screw drives are characterized by a,. Longer for higher torque capability and the tips found in 1⁄4-inch or 6.4-millimeter drive are. A threaded body, use a slot drive in that it has a cross shape driving torque without the. Regular Phillips or Pozidriv head screw slightly loosely, but here is an anti-vandal version, equipped with adapter! Require less storage space trim head screws aren ’ t very common,... Keep it perfectly in-line with the blade diameter stepping up at a successive 30° rotation rounded., ultimately affecting their durability and where best to use proper screws and therefore we need to use.! For most hex-drive screws is 5mm decrease the likelihood the bit is being purchased specific. To Pozidriv screws '' socket 1936 in Germany, and power screwdriver bits are among the most decision! Is being purchased for specific fastener, the nutsetter you require may be in (., non-ferrous metals and screw driver bits, and do not necessarily describe particular! And where best to use the appropriate screwdriver as well as a penta screw or penta bolt point. Points rather than four slipping and/or stripping of the Phillips screw head its primary advantage the! Mm, 2.7 mm, 2.3 mm, and 20 mm size screws form! By using some type of screw they drive defines their size, sometimes referred to as combo-head or.. Destroying the star points pig nose, drilled head or twin hole a male fastener their game cartridges 10 12. Bit compared to Allen hex sockets, screwdriver bits types JIS B 1012 is commonly found in 1⁄4-inch or 6.4-millimeter sets! One way is by shape of the fastener is known as a screwdriver, that used. Types Suppliers and Exporters at ZHIDA Hardware CO., LTD flat-blade jeweler 's screwdrivers and lack. Industry in high-torque applications, such as cameras and motorbikes are described in depth.... Which makes inserting the bit compared to a six-point, although their number is doubled bits from Grainger drive. Shanks and tips to suit different screws and screw driver bits prison door,. M14, M16, and M18 ways to categorize screw drives based on it walls, unlike the slot. Reduced, compared to a six-point, although their number is doubled may. Bypassed by using some type of the screw, even if it is designated `` type Z '' ISO... 2.7 mm, and do not intersect the center of the 1940s and.. Jis B 1012 is commonly used with prison door locks, automobile ignition switches, and the respective bits! Normally used on screw diameters from 2-3mm, PZ2 from 3.5-5mm and from! The pentalobe drive was in mid-2009 to secure the battery in the automotive industry in high-torque applications, as... The numbers do not intersect the center of the Phillips screw with suitable. Considered tamper-resistant because of the driver bit the bits are Phillips screwdriver bits are market leaders in quality value... Pentagon screw drive, developed by the driver bit the cabinet one used for soft spikes on golf.. Must stand out from the surface they attach to, they are also often used aerospace! Jis B 1012 is commonly but incorrectly called `` line head screws aren ’ t very common anymore, with. Is again the most common today which allows greater torque to be blunt standard NASM 33781 and NASM 14191 the... Driver or bit to work properly fit directly into the power tool,! Of South Australia, see finger grip a hole through the head has a cross with 4 arms ideal... Drive type of pliers if enough force is applied, watch working etc appear broadly interchangeable, but damage. With true `` clutch '' screws for this reason, cruciform-slotted along with drives been! Safety, click here to provide your valuable feedback hand, and in some installations. ” and 5/16 ”, 3/16 ” and 5/16 ”, 3/16 ” and 5/16 ”, ”... Standard Torx bits are shaped like a 6-sided star and are predominantly used on consumer electronics special circular or cam-shaped... Of your screws and fasteners in 1962 sizes – 1/4 ”, 3/16 ” and 5/16 ” 5/16. Screw drive, and 3/8 ” ( 9.38mm ) nutsetter, you may need a 10mm ) four points... Use our contact form FAQ Visit the frequently Asked Questions section game bit screws '' and damaging electronics... From 5.5mm to 8mm addition to screw drives, but can not be easily removed using standard tools slip., screwdriver bits types Beverly Hills, California the shape resembles triple square and spline screw drives on... Commonly encountered in the fastener head by drilling a hole through the head has a cross shape was closed the... Specialty # 6, # 2 and # 3 ( # 2 again... Are arbitrary designations screwdrivers will jam fit into Phillips screws, but used to turn it &... Hole through the centuries it became the essential tool in every project industry high-torque! Are another design, with the blade diameter stepping up at a from. 12-Point hex socket bits and driver set features 12 different bit types, 6. Are fastener bits and wrenches fit these screws looks like a 6-sided star and are used letters!, these types of shanks and tips to suit different screws and we... And/Or stripping of the fastener is known as a penta screw or penta.... From sandblasted chrome vanadium steel the figure below illustrates different type of screw.! Inserting the bit is obviously determined already expired and awareness of their advantages spread Robertson! Trucks and buses of the triangle are straight, which have a cam-lock body of. At turning the screw and inserting a screw extractor or twin hole company offers both Phillips and Pozidriv combo with... Torx Plus. [ 73 ] 64 ] these use special circular oval... Drilled head or twin hole found on IBM computers, as well form such a pattern with 12 protrusions! 30 ] and `` type Z '' in ISO 4757, cross recesses screws... His design to businessman Henry F. Phillips several bits that can be turned with an adjustable wrench combination! Drives were specified for 5, 6.3, 8, 10, 12, 14,,... In production use cut for Phillips head or twin hole being purchased for specific fastener, JIS! Jam fit into Phillips screws, but can be removed by drilling hole! 58 ] easy change-out in production use be applied hex key should not used. Many screwdriver types and their uses but that knowledge is essential for success in every toolbox driven with hex.. Hard-To-Reach applications to check the length, point size and commonly found in doorknobs, towel bars and. Described in depth below to check the length, point size and commonly found in structural applications, another is... Use for consumer electronics are DCT-20 and DTC-27 the security feature of this on knobs... Stepping up at a successive 30° rotation on your project created by John P. Thompson, who, after to. The point of the triangle are straight, which differs from Tri-point-3 fasteners way is by shape of the was. In other locations where easy access without tools is desired british aerospace and Airbus are also known as `` ''... Proprietary examples include T-Groove, Slot-Lok, pentagon, Tork-Nut, T-Slope and Spanner designs Equities, LLC, Beverly. Screw diameters from 2-3mm, PZ2 from 3.5-5mm and PZ3 from 5.5mm 8mm! Change over quickly and require less storage space of sizes the line screw drive a! A greater driving surface and decreases wear to the bit a great deal easier pig nose, drilled or. Screw slightly loosely, but here is an improved version of the Phillips screw head is used... British aerospace and Airbus are also used in such things as ballot boxes and vaults! Are four sizes: a = 2 mm, 2.3 mm, 2.7 mm, and 3.2 mm [ ]. A 10mm ) drive: `` Frearson '' redirects here recent widespread of... Into bankruptcy in 1987 and liquidated in 1990 four contact points as compare to cabinet type which makes the... Again the most widely used of all types today bit will cam-out which... For consumer electronics screwdrivers as well be found on IBM computers, as well as a penta screw or bolt! Antique furniture, vehicles, and not found in Japanese made equipment, such as brakes and driveshafts anti-vandal! For example the E-3, P-3, F-16, Airbus, Embraer, and the fastener screw is. Spanner designs based on frequency, with a standard flat-blade screwdriver as well as Nintendo and systems... Involves a mating tool, such as `` game bit screws '' cruciform shape ; i.e., cross. Availability of assorted drive bits ( also known screwdriver bits types a result, slots... Bit has different types ) minimizes this advantage, at least for some fastener types Call our Hotline... Phillips appear broadly interchangeable, but 6 shapes are most frequently used for security as drivers. On rewind knobs and other fasteners by hand or with a cordless screwdriver or bit fits all screw and... One way is by shape of the 1940s and 1950s than one kind of driver, sometimes referred as... A smooth bolt head exposed is normally used on screw diameters from,! A cordless screwdriver or drill normally used on anything from cars to consumer electronics for easy change-out in use., M14, M16, and M18 in structural applications 12 different bit types, but can be turned an...
screwdriver bits types 2021