Torx Paralobe is a further improvement over Torx Plus, [48] claiming 50% increased drive system torque over Torx and 20% over Torx Plus. 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 polydrive screw drive, also known as RIBE, [74] is spline-shaped with rounded ends in the fastener head. The tool has six flat teeth at equal spacing; the sizes are determined by the diameter of the star points. Its primary advantage over older screw drives is that it resists cam out. It is used primarily in the automotive industry in high-torque applications, such as brakes and driveshafts. Read Also: Different Types of Springs and Their Applications [Full Guide] The Function of Various Types of Screwdrivers 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 ]

The 12-pointed internal star shape superficially resembles the "double hex" fastener head, but differs subtly in that the points are shaped to an internal angle of 90° (derived from a square), rather than the 120° internal angle of a hexagon. In practice, drivers for the fasteners may be interchangeable, but should be examined carefully for proper fit before application of force. A hex key should not be used where a key of square cross-section is the correct fit. A thumbscrew is a type of screw drive with either a tall head and ridged or knurled sides, or a key-like flat-sided vertical head. They are intended to be tightened and loosened by hand, and are usually not found in structural applications. They are sometimes also cut for Phillips head or slotted screwdrivers, as well as having the knurling for finger grip. ASME Standard 18.6.8 covers dimensions for Type A (shoulder under the head), regular and heavy, along with Type B (without shoulder), regular and heavy. They can be found on many computer cases, and in other locations where easy access without tools is desired. Screwdriver bits". McMaster-Carr catalog (116thed.). p.2806. Archived from the original on 2019-12-14 . Retrieved 2010-06-11. 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). 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.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. ASTER System". www.lisi-aerospace.com (in French). Archived from the original on 2018-06-13 . Retrieved 2018-06-13. The Phillips Screw Company owns the licensed product that is the Mortorq spiral drive system. The Phillips Screw Company must inspect and approve any punches, bits, and screws before they are cleared for production. Along with this "all licensees must submit samples regularly to ensure that the strict quality standards are maintained". [38] Solid modeling is used for the design of the punches, bits, and screws. Files are sent over to manufacturers containing these models so that there is no miscommunication and all the parts are the same across the board. 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.

Tamper Proof Nuts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25. Improvements in or relating to screw threaded fasteners and drivers for use therewith". Google Patents. 1962-05-04. Archived from the original on 2020-01-26 . Retrieved 2017-10-13. TORX PLUS Tamper-Resistant Drive System". www.acument.com. Archived from the original on 2019-04-18 . Retrieved 2019-04-18.Oberg, E. Jones, F. Horton, H. (1984). Machinery's Handbook, 22nd ed. New York: Industrial Press Inc. pp. 1157, 1159

The middle part between the blade and the handle is called the shank. On its lower part tip or blade is made.

Fastener Superstore Fastener Guide". Archived from the original on 2017-12-29 . Retrieved 2017-12-28. The Phillips Screw Company". phillips-screw.com. Archived from the original on 2021-10-08 . Retrieved 2021-10-07. 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. Triangular recesses and heads". Screw drive systems. Archived from the original on 2016-10-24 . Retrieved 2017-09-02. 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.