XZN-M14-Choc Spline Impact Sockets M4 to M18

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The triple-square, also known as XZN, is a type of screw drive with 12 equally spaced protrusions, each ending in a 90° internal angle. The name derives from overlaying three equal squares to form such a pattern with 12 right-angled protrusions (a 12-pointed star). In other words, three Robertson squares are superimposed at a successive 30° rotation. The design is similar to that of the double-square—in both cases, the idea being that it resembles a square (Robertson) but can be engaged at more frequent angles by the driver bit. These screws can be driven with standard Robertson bits. Also known as an ECX or Combination Tip drive. A combined slotted and Robertson drive screw found in electrical power equipment and distribution equipment. The design allows for higher torque application with reduced camming, slipping out and damaging the fastener. [63] The ECX drive is not compatible with older combination Phillips and slotted head screws. [64] Although Milwaukee Electric Tool holds the trade name ECX, their marketing materials do not tell what type of screw head ECX is designed to fit. [50] Clutch [ edit ]

Machinery's Handbook (PDF) (27thed.). Industrial Press, Inc. 2004. p.1596. Archived from the original (PDF) on 8 September 2017 . Retrieved 8 September 2017. A Phillips screw head is slightly different from a PoziDriv; [10] see §Pozidriv section below for details. Also called BNAE NFL22-070 after its Bureau de normalisation de l'aéronautique et de l'espace standard number. A cross-head screw with a two-step driver design, with the blade diameter stepping up at a distance from the point.Means for uniting a screw with a driver". US Patent and Trademark Office. US Government. Archived from the original on 5 March 2016 . Retrieved 28 February 2016. 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. The pentalobe screw drive is a five-pointed tamper-resistant system implemented by Apple in its products. [43] Apple's first use of the pentalobe drive was in mid-2009 to secure the battery in the MacBook Pro. Smaller versions are now used on the iPhone 4 and subsequent models, the MacBook Air (since the late 2010 model), the MacBook Pro with Retina Display and the 2015 MacBook. Pentalobe screw sizes include TS1 (also known as P2 or 0.8mm, used on the iPhone 4 and subsequent models), TS4 (also known as P5 or 1.2mm, used on the MacBook Air [since late 2010], the MacBook Pro with Retina Display and the 2015 MacBook) and TS5 (also known as P6 or 1.5mm, used on the 2009 MacBook Pro battery). The TS designation is ambiguous as it is also used for a Torq-set screw drive. 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.

Phillips Fastener". Phillips Fastener. Archived from the original on 2020-10-23 . Retrieved 2020-09-05. Phillips Screw Company". Phillips-screw.com. Archived from the original on 2017-05-02 . Retrieved 2017-05-01.a b "Tork-Bolts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25.

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.

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Spline drives were specified for 5, 6.3, 8, 10, 12, 14, 16, and 20mm size screws. [82] Its primary advantage is its ability to resist cam out, so it is used in high-torque applications, such as tamper-proof lug nuts, cylinder head bolts, and other engine bolts. The Supadriv (sometimes spelled incorrectly as "Supadrive") screw drive is very similar in function and appearance to Pozidriv. It is a later development by the same company. The description of the Pozidriv head applies also to Supadriv. While each has its own driver, [26] the same screwdriver heads may be used for both types without damage; for most purposes it is unnecessary to distinguish between the two drives. Pozidriv and Supadriv screws are slightly different in detail; the later Supadriv allows a small angular offset between the screw and the screwdriver, while Pozidriv has to be directly in line. [25] [27] [28] Sizes are: M4, M5, M6, (M7), M8, (M9), M10, (M11), M12, (M13), M14, (M15), M16, (M17) and M18 (the sizes in parentheses are less commonly used, but they do exist). Despite the similar naming scheme to metric fasteners, there is no correlation between the name of the size and the dimensions of the tool. Some sizes (at least M14, M16, M18) are also available in a tamperproof version (with a center hole) MTI Catalog" (PDF). moodytools.com. Archived (PDF) from the original on 2014-01-09 . Retrieved 2014-01-10. 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 ]

Combo drive". Klien Tools. 3 November 2014. Archived from the original on March 11, 2015 . Retrieved 1 July 2022.

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a b Radio Material School, Naval Research Laboratory. (1943). NAVPERS 14004 Mechanical Practice. Washington, D.C.: USGPO. pp. 48, 50, 51. 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. 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] a b arcticpenguin (2008-12-29). "SupaDriv". Instructables.com. Archived from the original on 2012-03-24 . Retrieved 2012-03-12.