Combo drive". Klien Tools. 3 November 2014. Archived from the original on March 11, 2015 . Retrieved 1 July 2022. Avsafe". www.losspreventionfasteners.com. Archived from the original on 2017-03-01 . Retrieved 2017-02-28. Due to the difficulty of turning these fasteners without specialized (and uncommon) five-point wrenches such as hydrant wrenches, they are commonly used for tamper resistance by public utilities on water meter covers, natural gas valves, electrical cabinets, and fire hydrants. Robertson screws are commonplace in Canada, though they have been used elsewhere [14] :85–86 and have become much more common in other countries. As patents expired and awareness of their advantages spread, Robertson fasteners have become popular in woodworking and in general construction. Combinations of Robertson/Phillips/slot drives are often used in the electrical trade, particularly for device and circuit breaker terminals, as well as clamp connectors. Triangular recesses and heads". Screw drive systems. Archived from the original on 2016-10-24 . Retrieved 2017-09-02.

a b Editors (April, May 1913). "Goodwin's Hollow Safety Set Screw" Hardware Dealers' Magazine. pp. 846 V, 865, 1090 Camcar eventually became part of Textron Fastening Systems in the 1990s. In 2006 Textron Fastening Systems was sold to Platinum Equities, LLC, of Beverly Hills, California. They renamed the company Acument Global Technologies, which as of 2010 includes Avdel, Camcar, Ring Screw, and others. Machinery's Handbook (PDF) (27thed.). Industrial Press, Inc. 2004. p.1596. Archived from the original (PDF) on 8 September 2017 . Retrieved 8 September 2017. Some consumer appliances, such as espresso machines from Jura Elektroapparate, use a proprietary screw head with an eccentric oval to dissuade owners from servicing their own machines.a b Thompson, Avery (October 10, 2016). "11 Strange Screws You Don't See Every Day". Popular Mechanics. Archived from the original on August 4, 2020 . Retrieved September 5, 2020. Fastener Superstore Fastener Guide". Archived from the original on 2017-12-29 . Retrieved 2017-12-28. Tamper Proof Nuts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25.

The Slotted/Pozidriv is slightly different from the Slotted/Phillips (PH/S), and good use requires special screwdrivers. [ citation needed] ACR Phillips II Plus [ edit ]

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Coin-slot drives are so-called because of the curved bottom of the recess, which facilitates driving them with a suitable coin. They are often used on items where the user is not likely to have a screwdriver when needed, such as recessed screws that attach cameras to tripod adapters, and battery compartments in some equipment such as children's toys. [ citation needed] Hi-Torque [ edit ]

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. The manufacturing process for Pozidriv screwdriver bits requires a slightly more complex cutter than that for Phillips, however both can be manufactured in four cuts from a tapered blank.ISO 8764-1:2004(E) Assembly tools for screws and nuts — Screwdrivers for cross-recessed head screws — Part 1: Driver tips" (PDF). Archived (PDF) from the original on 2023-04-30 . Retrieved 2023-05-01. Hi-Torque slot drives were designed by Alcoa Fastening Systems, for situations where very high torque is needed, along with the ability to repeatedly install and remove the fastener. [7] The design features curved walls, unlike the straight-walled slot drive. Lox: Screws Designed for Power Tools". www.lox.com. Archived from the original on 2017-12-09 . Retrieved 2017-12-24.

Care should be taken not to confuse the name of this pattern with the casual phrase "spline head" which usually refers to the XZN pattern. a b c "Unterschied zwischen Pozidrive und Superdrive"[Difference between Pozidriv and Supadriv] (in German). Goedkopeschroevenkopen.nl. Archived from the original on February 22, 2014 . Retrieved 2014-03-20. A Phillips screw head is slightly different from a PoziDriv; [10] see §Pozidriv section below for details.Wilder, George. "What are the differences between the two types of drive– Phillips and Posidriv?" (PDF). v8register. Archived (PDF) from the original on 2016-04-09 . Retrieved 2017-09-02. The Phillips screw drive (specified as an ANSI Type I Cross Recess [9] and type H in ISO documentation) was created by John P. Thompson, who, after failing to interest manufacturers, sold his design to businessman Henry F. Phillips. [10] [11] Phillips is credited with forming a company ( Phillips Screw Company), improving the design, and promoting the adoption of his product. [10] The original 1932 patent [12] expired in 1966, but the Phillips Screw Company continued to develop improved designs. [10] Docter, Quentin; Dulaney, Emmett; Skandier, Toby (2006). CompTIA A+ Complete Study Guide. John Wiley and Sons. p.766. ISBN 978-0-470-04831-3. Archived from the original on 2017-02-21 . Retrieved 2016-09-24. a b c d e f g h i Higgins, Matt (September 16, 2015). "What is the Difference: Screw Bits– Phillips vs. Pozidriv". Fine Homebuilding. 154 (November 2015): 38. Archived from the original on 2016-04-19 . Retrieved 2015-09-25. New Bolt Drives FCA to Better Seat Assembly". www.assemblymag.com. Archived from the original on 23 August 2019 . Retrieved 23 August 2019.