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This drive type has the disadvantage of not being as precisely controlled as can be obtained by proper use of a torque wrench; applications may still fail due to either too little torque being applied to correctly fasten the joint, or too much torque being required to shear the head, resulting in damage to the material being fastened. [ citation needed] Line Head and Line Recess [ edit ] Line head driver sizes [1] Internal Alloy Artifacts, Various Tool Makers (section on Allen Manufacturing Company), archived from the original on 30 December 2011 , retrieved 25 January 2012. Tamper Proof Nuts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25. 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. Apple uses Y-type screws to secure the battery on the 2010 and 2011 MacBook Pro, as well as an extremely small type in the Apple Watch, iPhone 7 and iPhone X. [87] [88] This style of screw is often called a "tri-wing", although that name more properly belongs to a different design (see below).
Screwdriver bits". McMaster-Carr catalog (116thed.). p.2806. Archived from the original on 2019-12-14 . Retrieved 2010-06-11.
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Combo drive". Klien Tools. 3 November 2014. Archived from the original on March 11, 2015 . Retrieved 1 July 2022. a b "Tork-Bolts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25.
a b Radio Material School, Naval Research Laboratory. (1943). NAVPERS 14004 Mechanical Practice. Washington, D.C.: USGPO. pp. 48, 50, 51. Call Allen Ford Romford Service Centre Parts: 01708 917962 Service: 01708 917961 Bodyshop: 01708 242651Tork-Nuts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25. Machinery's Handbook (PDF) (27thed.). Industrial Press, Inc. 2004. p.1596. Archived from the original (PDF) on 8 September 2017 . Retrieved 8 September 2017.
The term "hex key" is best known as " Allen" in the English-speaking countries like the UK, Australia, Canada and the U.S. (The "Allen" name is a registered trademark, originated by the Allen Manufacturing Company of Hartford, Connecticut circa 1910, [1] now owned by Apex Tool Group, LLC, which was acquired by Bain Capital in 2014), and also in Spain and Mexico ( llave Allen, in Spain pronounced with Spanish double L, /ʎaβe aʎen/). 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. The following are screw drives based on a cruciform shape; i.e., a cross shape. Other names for these types of drives are cross recessed, cross-head, cross tip, and cross-point. A double slotted screw drive is not considered cruciform because the shape is not recessed, and consists only of two superimposed simple milled slots. Some of these types are specified in ISO 4757, Cross recesses for screws. Digest, Reader's (2003). Family Handyman Best Projects, Tips and Tools. Reader's Digest. p.106. ISBN 978-0-7621-0455-0. Archived from the original on 2016-12-24 . Retrieved 2016-09-24. 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]
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Line Head and Line Recess screw drives are Japanese systems with male, female and tamper-resistant configurations. [72] Adler, Alexander (1998-05-18). Testing and Understanding Screwdriver Bit Wear (Master's thesis). Virginia Tech. hdl: 10919/36701. Transactions of Technical Conference on Metric Mechanical Fasteners. American National Standards Institute. 1975. p.67. Archived from the original on 2021-04-15 . Retrieved 2020-10-26. Recessed head fastener and driver combination". Google Patents. 2015-12-11. Archived from the original on 2020-01-26 . Retrieved 2017-10-13. Swear words, sexual references, hate speech, discriminatory remarks, threats, or references to violence
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