XZN-M14-Choc Spline Impact Sockets M4 to M18

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The JIS B 1012 [29] was commonly found in Japanese made equipment, such as cameras and motorbikes. Superficially it looks like a Phillips screw with narrower and more vertical slots, to give less tendency to cam out. The bottom of the recess is flat, and the point of the driver has to be blunt. A Phillips screwdriver has the same 26.5 degree cone angle but because of the tapered slots will not seat fully, and will damage the screw if forced. The Phillips Screw Company". phillips-screw.com. Archived from the original on 2021-10-08 . Retrieved 2021-10-07. A U-drive screw has a helical thread with an angle acute enough to be driven by a hammer or pressure from an arbor press, and thus has a domed head with no means of turning it. [92] These are most frequently driven into plastics with a pre-drilled pilot hole. a b c d e Dougan, Lee. "Aerospace Drive System Finding New Applications". www.phillips-screw.com. Phillips Screw Company . Retrieved 21 September 2022. a b Radio Material School, Naval Research Laboratory. (1943). NAVPERS 14004 Mechanical Practice. Washington, D.C.: USGPO. pp. 48, 50, 51.

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. Adler, Alexander (1998-05-18). Testing and Understanding Screwdriver Bit Wear (Master's thesis). Virginia Tech. hdl: 10919/36701. Most tamper-resistant screw configurations rely on the common unavailability of corresponding drivers to reduce the likelihood of widespread tampering. True tamper-proof - rather than merely resistant - screw drives include the breakaway head and one-way screw drives. ISO 4754-1983(E) Cross recesses for screws" (PDF). Archived from the original (PDF) on April 30, 2023 . Retrieved October 1, 2023.a b c d Capotosto, Rosario (December 1996). "Screwdriver Basics". Popular Mechanics. 173 (12): 82–83. ISSN 0032-4558. Archived from the original on 2017-02-16 . Retrieved 2016-09-24. ASTER System". www.lisi-aerospace.com (in French). Archived from the original on 2018-06-13 . Retrieved 2018-06-13.

A combination slotted/hex head cap is often used for self-tapping screws for metal, where the hex head enables greater torque during the initial self-tapping installation, while allowing the convenience of a slotted screwdriver to be used for removal and reinsertion. The Phillips Screw Company". www.phillips-screw.com. Archived from the original on 2014-12-21 . Retrieved 2015-01-16. A cross or double-slot screw drive has two slots, oriented perpendicular to each other, in the fastener head; a slotted screwdriver is still used to drive just one of the slots. This type is usually found in cheaply-made roofing bolts and the like, where a thread of 5mm (0.20in) or above has a large flattened pan head. The advantage is that they provide some measure of redundancy: should one slot be deformed in service, the second may still be used. Line Head and Line Recess screw drives are Japanese systems with male, female and tamper-resistant configurations. [72]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.