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When a Phillips is not a Phillips - Plus So Much More! A Continuation of Screws and Drives by Egon Pavlis, Biomedtronix Inc. With overwhelm...
So, why all the confusion then?Why all the damaged screw heads and drivers?Why is this screw and driver thing so awkward? Read on and be amazed while ...
Wooden ScrewsAround the first century, screw shaped tools became common, however, historians do not know who invented the first. Early screws were mad...
There are basically two types of security fasteners - tamper-proof and tamper-resistant. Several tamper-resistant drive types were created and were or...
Before visiting screws you should be aware of Non-Slip Fluids. You may not be aware these products are even available (like me). '''ND Industries Driv...
These pliers may also be worth considering when removing stubborn screws.Got a stuck screw or a screw with some wacky security head? "Do not reach for...
[[br]] I accidentally found this unique drive head system while working on the original Phillips project and since it did not apply there have since l...
[[br]] Oval Pan Head Security Screws are unique in the sense they have no conventional drive slot in the head. The screws must therefore be installed ...
[[br]] One type of security fastener is the slotless, tamper resistant Avsafe™ Series FP/FR/FG screw marketed by Avdel Corporation Systems Division, P...
[[br]] This fastener includes a round, blind hole or pocket in its head. Installation and removal of the fastener is accomplished with a tool containi...
[[br]] The Keyed-Lok® Security Screw, by Bryce Fasteners, have a pin within the unique shaped socket of the head requiring a special insert bit to ins...
[[br]] Spin-Lok", from Bryce Fasteners, is a tamper-proof screw for applications requiring permanent installation. Spin-lok" is configured so that the...
[[br]] Cutting a slot in a screw head to turn it is an old idea: drawings from the 16th century show screws with slotted heads. The advantages of t...
[[br]] This is basically a Slot Drive but ACR® (Anti Camout Ribs) technology reduces damage to screw heads while giving better drive force and improve...
[[br]] This screw and driver are designed to center on the screw head and not slide out. Some of the positives of the system are that it works, althou...
Tightening and unscrewing the coin screw is quite effortless when using a coin as a tool because of the large size of screwhead and slot. Very simila...
[[br]]See also Clutch Head Type G. Originated by United Screw and Bolt. There are two kinds of clutch head screws, the older G-style and the newer A-...
[[br]]See also Clutch Head Type A. Sometimes referred to as the butterfly shape, it is the older than Type A. Found in some trailer trucks and mobile...
Clutch Head Security Screws are also known as 'One Way Screws' and are used for permanent installations. They can be installed using an ordinary screw...
[[br]]Also known as Snake Eyes, Pig Nose Screws or Twin Hole. They have two small holes drilled into the head. A special twin pin driver bit is requir...
This drive is similar to the 4-Notched described later. Spacing of the pins is not critical. Sized include #4, #6, #8, #10, #12, #14
[[br]]The T-screw has a T-shaped head, with flat sides. It can be turned using the special spanner. Quite often the application T-Screws are used for ...
[[br]]Alcoa Fastening Systems' Hi-Torque® recess is milled into the fastener head and has a proven record of performance wherever maximum efficiency f...
[[br]]Alcoa Fastening Systems Conical (Connie®Torque® proprietary recess incorporates an innovative design that provides more ready assistance during ...
[[br]]Tri-Wing® is a registered trademark of Phillips Screw Company. The Tamper Tri-Wing® Security Screw has a unique triangular slotted recess, whic...
[[br]]Opsit® are a registered trademark of Tamperproof Screw Company, Inc. An interesting concept for tamperproof screws is the reverse thread sheet ...
[[br]]The Tamper CELOK® Screw has a constant trilobular geometry making the recess highly tamper-proof, requiring a special insert bit or key wrench t...
[[br]]Slots in the outer edge of the head provide a more positive drive with less risk of fastener distortion and breakage. Power-driven equipment may...
[[br]]Designed specifically to give the utmost protection from theft and vandalism, Uniqz® is said to be the ultimate security fastener which became K...
[[br]]This patented drive provides the perfect tamper-proof assembly. Theft-proof and decorative, yet inexpensive. Special drivers available for field...
[[br]]Torx 3-Lobed screws and screwdrivers that have triangle-shaped sockets and heads are used in the Netherlands and cannot be found in North Americ...
TP3® is a new triangular recessed drive offers great security. You may be able to make my own by filing down a 6-sized hex bit, but they never fit or...
[[br]]Not much information on these available but basically a solid triangle recess but with a pin center. Very difficult to make a tool for this whic...
[[br]]Not many tools will work on this tamperproof screw head without damaging it. Uses a driver socket with triangle hole. Simple but so effective.[...
[[br]]The Tricle Re-usable Security Screw has a unique pin recess design making the recess highly tamper-proof, requiring a special insert bit or key ...
[[br]]Tri-Arc® is a new concept in screw head, a bits and driver design that has been comparatively tested to Crosshead design. The head has a recess ...
[[br]]Trigram® screws and drivers have a flat end, unlike the Tri-Wing®. The sides are tapered to prevent non-designated drivers from proper seating ...
Microtech® Knives use an exclusive Terzuola screw with recesses for 3 or 4 pins drivers. Outside diameters of all screws may vary on different styled...
[[br]]Tampruf® is Australian and refers to both screw heads and nuts. Rather than the regular bit tips for drivers, these use a socket drive system. ...
[[br]]Tamper resistant, releasable Scroll™ Nuts and Scroll™ Bolts are the ultimate security fixing. They offer a clever solution for those situations ...
[[br]]Double-slot cut screw heads, with cuts offset by 90° and is rarely used or seen today. The advantage of this type of screw head is there are 4...
[[br]]Perpendicular Hi-Torque recess is milled into the fastener head and has a proven record of performance wherever maximum torque is required. The ...
[[br]]The Shuenn Chang Fa Enterprise Co of Taiwan, possibly also other companies, make this unique cross-slot drive head type. Fellow Instructable ...
[[br]]These are used on Mission™ brand Inline Hockey Skates CSD103 and possibly others. There are special tools for these bolts but any standard wrenc...
[[br]]Produced by Jiangyin Ruyi Standard Component Co., Ltd; China. Quite often the application for Parallelogram Head bolts are used as blind fasten...
[[br]]In 1908, square drive screws were invented by Canadian Peter L. Robertson. Twenty-eight years before Henry Phillips patented his Phillips head s...
[[br]]Only Robertson Inc. makes Robertson® screws and drivers, the others are generically called Square Drive and are made by several manufacturers an...
[[br]]Basically a square recess, but the recess also has a temperproof center pin. The drive must have the mating hole in the center end.[[br]]
[[br]]This is a Robertson Inc. version of a Square Drive. See Robertson Recess and Square Recess. After all fair is fair. [[br]]
br]]This cross drive screw story starts when Henry Phillips purchased a crude form of a cruciform-recessed screw head concept from an Oregon inventor ...
[[br]]The Tamperproof Screw Company was founded in the late 1970's when George Friedman developed the Phillips® security screw. As its name state...
[[br]]Patented by the Phillips Screw Company to compliment the Phillips® drive. ACR® was developed for the aerospace industry to avoid costly head str...
[[br]]A combination drive designed by marrying the classic Phillips® cruciform recess and the popular square drive recess. The result is a highly effi...
[[br]]Also from the Phillips Screw Company and very similar a Phillips Square-Driv® plus the added ACR® Anti-Camout Ribs. It has all the advantages of...
[[br]]Also by Phillips Screw Company. Yet another combination drive system. Not much information on the Internet about this drive. It could mean the h...
[[br]]A recent evolution of the Phillips® design resulted in a next generation, patented Phillips II®. The ACR® improvement is basically a Phillips® s...
[[br]]Founded in 1978, AVA Specialty Fasteners Ltd. of Canada presents Quadrex® which combines the best features of Cross Recess and Square Socket dri...
[[br]]The Idea of the Robertson/Phillips (Recex) combo drive was invented by Robertson Inc. in Milton Ontario and Recex® is the only combo drive Rober...
[[br]]A later cross drive system referred to in ANSI standards as Type 2 recess. It was developed by an English inventor named Frearson and was produc...
These are often improperly referred to as Japanese Phillips. Commonly found in Japanese equipment. JIS looks much like a Phillips screw (and even more...
[[br]]Sel-O-Fit® is a registered trademark of Cooper Industries. The bits are designed to provide a more efficient means of driving Pozidriv® screws. ...
[[br]]Also called BNAE NFL22-070 after its Bureau de Normalisation de l'Aeronautique et de l'Espace standard number. Possibly a security screw drive s...
[[br]]The Mortorq® Spiral Drive recess developed by Phillips®, is much shallower than other standard recesses on the market, and can be put into a muc...
[[br]]The Torq-Set® offset cruciform fastener system, by Alcoa Fastening Systems, is a proven product in the aerospace market. For applications where ...
[[br]]Torq-Set® ACR® ribbed offset cruciform drive has become the revolutionary fastener system preferred by aeronautical engineers for use on militar...
[[br]]The Sentinel® Security Screw has a unique head that requires only a standard 'Pozi' screwdriver for insertion. There is no surface to catch fo...
[[br]]The 4-Hole Security Nut is much as its name states, it has 4 location holes in the nut that are surrounded by a slim circular groove, requiring ...
See Microtech® 3-Pin. Pictures used are copywritten by Microtech.
[[br]]These screws were used on some now discontinued mobile phones. No further information found.[[br]]
[[br]]Developed by the Bristol Co, the multiple spline drive system is recognized by design engineers as the superior method of transmitting torque be...
[[br]]The Torx-Plus® Security Screw is an upgrade from its predecessor (6-Lobe TX Security Screw) providing a higher degree of security as the design ...
[[br]]Textron Fastening Systems is now Acumet Global Technologies and developed the External Torx-Plus® Low-Profile screw drive system. The externa...
[[br]]The Cinstar® Security Screw is an upgrade from its predecessor (6-Lobe TX Security Screw) providing a higher degree of security as the design is...
[[br]]Penta® shapes are extremely difficult to make, and Bryce Fasteners keeps the dimensions secret. They have been tested under very severe securit...
[[br]]A product of Bryce Fastener. The Penta-Head" Bolt is available when a traditional tamperproof screw just will not do. These pentagon shaped head...
[[br]]A product of Bryce Fastener. Pentagon shapes are extremely difficult to make, dimensions are secret. They have been tested under very severe sec...
[[br]]The geometry of Penta-Plus™ makes it more secure than all other tamper proof screws. Penta-Plus™ is proprietary to Bryce Fastener and configured...
[[br]]An advanced, more secure version of Penta-Plus®. Bryce Fastener retails exclusive rights and control over the restricted screws and drive, maki...
[[br]]Very similar to the Uni-Screw® but with enhanced security feature of custom off rotation of each pentagram rather than in-line hex. Close tolera...
[[br]]Another unique high torque security drive system which can only be undone with the unique matching socket. This product is extra resilient to at...
[[br]]Probably the most common of all fastener heads, hex heads are also very old. Fasteners with hexagonal heads were used to hold armor together in ...
[[br]]From Bryce Fasteners, the Hex-Pin™ Security Screw as its name states has an internal pin within the hexagonal socket of the head, requiring a sp...
[[br]]What more can be said for the common hex head bolt or nut, they are everywhere. Corners tend to round when over torqued especially with an open-...
[[br]]Developed by the Bristol Co, the multi-spline drive system is recognized by design engineers as the superior method of transmitting torque becau...
Torx® was developed in 1965 by Camcar Technical center, located in Rockford, Illinois, of Acument Global Technologies (formerly Camcar Textron), is th...
An external E-Torx® version exists, where the screw head has the shape of a Torx® screwdriver bit, and a special Torx® socket is used to drive it. The...
Camcar LLC developed an improved profile of Torx® designated Torx Plus®. The improved lobe design allows for increased torque transmission and virtual...
[[br]]Camcar also developed the Torx Plus® External low profile drive. This drive system is engineered to provide optimal torque transfer and extende...
[[br]]Torx® is a registered trademark of Acument Intellectual Properties LLC, see Torx® Drive step. Tamper resistant Torx® screws feature a post in th...
[[br]]TTAP® is an improved "hexalobular" drive from Infast AS Oslo, Norway, designed for no wobbling and stable stick-fit. The stick-fit no wobbling f...
[[br]]Polydrive®, also known as Ribe CV", Ribe CS" or simply Ribe", is a fastener specification used primarily in the automotive industry, for example...
[[br]]After the expiration of the Torx® design patent in 1988, many non-licensed fastener manufacturers started producing screws with what has become ...
[[br]]A tamperproof, Torx-like, 6-lobe screw drive system product with tamper proof center pin by Bryce Fastener.[[br]]
[[br]]System Zero® was the registered trademark of Deltight Industries Ltd., but Deltight has been taken over by BAS Components Ltd. and these screws ...
[[br]]Seton Security of the UK, sells a Screw Kits (Unknown manufacturer) that comprises: 4 x Stainless Steel Security Screws, 4 x Plugs and 1 Hex Dri...
[[br]]The Uni-Screw® is being manufactured and distributed by Forward Engineering under a license from Uni-Screw® and the first commercial products ar...
[[br]]No further information found on this type of drive, may just be artist perception.[[br]]
[[br]]Pozidriv® was jointly patented by the Phillips Screw Company and American Screw Company in the USA. Developed by GKN in the 1960s, the recess is...
[[br]]Often refered to as Pozidriv®, these two drives are not exactly the same. Each has its own driver but both will also work with the other. The sc...
[[br]]"With the Spider Drive™ - Camout is Out! The revolutionary new Spider Drive™ is the most positive internal drive system on the market which elim...
[[br]]Another unique high-torque security drive. This patented system is a superior alternative to the shear nut, having the advantage of not leaving ...
[[br]]Scrulox® is another Robertson Invention. An 8-sided (double square) decorative design that can be used with a standard Robertson bit, or for add...
[[br]]Double Hex is a fastener specification. It is physically similar but incompatible with triple square and spline drive fasteners. Standard hex ke...
[[br]]From fellow instructable member lordzion: 12 Point Double Hexagon usually associated with a flange head and in high-torque applications where th...
[[br]]Triple Square, also known as a XZN are commonly found on German vehicles such as BMW, Mercedes, and Volkswagen. These screws are used in high to...
[[br]]This drive is the inverse of 12-Point Triple Square. They are used in the highest torque applications and military.[[br]]
[[br]] LOX® technology has already been licensed for use by several distributors, and it is steadily gaining a well-earned reputation as the leading f...
[[br]]Bryce Fastener put a great deal of research and development into the Key-Rex™ fastener with the intent to make it a lock. Key-Rex™ shapes are cr...
[[br]]See Slot Type and Phillips Drives separately. Note the interesting tool made for these screws.[[br]]
[[br]]See Slot Type and Square Drives separately.[[br]]
[[br]]See Slot Type and Square Drives separately.[[br]]
[[br]]See Slot Type and Torx Drives separately.[[br]]
[[br]]See Slot Type and Hex Drives separately.[[br]]
[[br]]See Hex and Phillips Drives separately.[[br]]
Produced by at least 3 different companies Diversified Security Systems, Channell Commercial Corporation and NewElectronxChannell Commercial Corporati...
The common Gamer Drive group include 2 odd sizes of lobed drives and a small Triwing and Triangle drive.Nintendo 4.5mm System Security ToolThis is use...
==== Glossary of Terms ====Camout (or cam-out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque requi...
Biomedtronix Inc. is a resource of experienced biomedical technical skills.My Business Formula: Commitment + Excellence = Biomedtronix My Mission: ...
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Anyway, I keep all the leaky relief valves that I replace and strip them for thier brass housing. Some of them use tamper proof Torx or even Clutch G screws to secure the valve/spring assembly to the brass housing. But alot of them have these Torx 3-lobe screws that I've used larger Tri-wing bits to remove them but eventually the bit gets ruined and those aren't the easiest to come by either. Torx 3-lobe are impossible to come by and now I'm forced to just sawzall 'em off. Here's a couple pics.