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. a b c d e f g Rybczynski, Witold (2000). One good turn: a natural history of the screwdriver and the screw. New York [u.a.]: Scribner. ISBN 0-684-86729-X. Screw head types / Product Guides / Service / Information & Services / England / Home— Wiha | Screwdrivers L-Keys Bits Pliers Online Shop| Premium Tools for Professionals". 2008-02-13. Archived from the original on 2008-02-13 . Retrieved 2012-03-12. 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]

Torx Paralobe is a further improvement over Torx Plus, [48] claiming 50% increased drive system torque over Torx and 20% over Torx Plus. The Phillips Screw Company". www.phillips-screw.com. Archived from the original on 2014-12-21 . Retrieved 2015-01-16. 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. ISO 8764-2:2004(E) Assembly tools for screws and nuts — Screwdrivers for cross-recessed head screws — Part 2: General requirements, lengths of blades and marking of hand-operated screwdrivers" (PDF). Archived (PDF) from the original on 2023-04-30 . Retrieved 2023-05-01.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). 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

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. Tamper-resistant types [ edit ] A set of "secure" or otherwise less common screwdriver bits, including secure Torx and secure hex or "allen" variants. The knife manufacturer Microtech uses a variation of this with 3 round holes arranged in a triangle shape. The camera company Leica Camera has used versions of this on rewind knobs and other levers on their rangefinder cameras. [ citation needed] 12-spline flange [ edit ] 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. TORX PLUS Tamper-Resistant Drive System". www.acument.com. Archived from the original on 2019-04-18 . Retrieved 2019-04-18.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. ISO 4754-1983(E) Cross recesses for screws" (PDF). Archived from the original (PDF) on April 30, 2023 . Retrieved October 1, 2023. MTI Catalog" (PDF). moodytools.com. Archived (PDF) from the original on 2014-01-09 . Retrieved 2014-01-10.

McMaster-Carr catalog (116thed.). p.2821. Archived from the original on 2019-12-14 . Retrieved 2011-09-26. Needs login A correctly sized JIS driver will engage at full depth into a Phillips or Pozidriv head screw slightly loosely, but without damage. JIS heads are often identified by a single dot or an "X" to one side of the cross slot. [30] Palese, Jim (July 7, 2015). "Salient Features of Clutch Head Screws". The Mutual Screw Mantra. Archived from the original on 2016-05-29 . Retrieved 20 March 2021. JIS" or ISO 8764 standardized cruciform-blade screwdrivers are available for this type of screw, and should always be used to avoid head and driver damage. Frauenfelder, Mark (2011-01-20). "Apple's diabolical plan to screw your iPhone". Boing Boing. Archived from the original on 2011-01-23 . Retrieved 2011-01-23.

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.