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.

The reason could be because there are two different types of crosshead screws which look similar, but are actually different. The two types are the Pozidriv and the Phillips. 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. Small note, I see you recommend the Wera Rostfrei screwdriver. While Wera does indeed make really nice, good quality screwdrivers (however no longer German made… Wiha still makes their stuff in Germany tho) Triple-square fasteners are referred to as "spline" in the UK. This is potentially confusing if looking for the more unusual 12-spline flange type. While they are distinguished under close inspection by the angle at the tip of each of the 12 points (with a 90° angle on the XZN, instead of 60°) the general similarity and ability to insert the wrong tool can cause damage to the head.

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. I even got some Japanese ones by Vessel, and they too are marked as P1, and P2 (depending on the size). Vera bits and screwdrivers are marked the same way (P, Phillips). Both those brands fit wonderfully into JIS screws on Shimano and Yamaha. Unior P screwdrivers, on the other hand, don’t fit nearly as well – the same goes for most other brands and models I’ve tried.

The easiest way to know whether a screw is Phillips or Pozidriv is that all Pozidriv screws have lines etched the screw head in-between the four arms of the cross. This visual aid means that you can instantly recognise a whether a screw is a Pozidriv or not. You can also see the difference between a Phillips screwdriver and a Pozidriv, as the latter has the ridges. Conclusion Screwdriver bits". McMaster-Carr catalog (116thed.). p.2806. Archived from the original on 2019-12-14 . Retrieved 2010-06-11. Differences between JIS and Phillips screws and screwdrivers are difficult to tell with the naked eye, but are easily noticed when using a screwdriver!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. The Good news: yes, there are more than one manufacturer (and model) of good quality cross-head screwdrivers (some more recommendations are in Chapter 4).

The Phillips Screw Company". www.phillips-screw.com. Archived from the original on 2014-12-21 . Retrieved 2015-01-16. The Type II (Conical/Connie) design adds a conical cup that receives a centering pin on the driver, improving the alignment of the driving tool to the fastener recess. The 12-spline flange screw drive has twelve splines in the fastener and tool. It consists of 12 equally spaced protrusions, each with a 60° angle. It is achieved overlaying 4 equilateral triangles, each one rotated 30° over the previous one. The spline drive was part of the obsolete, U.S-designed Optimum Metric Fastener System and was defined by ASTM B18.2.7.1M, which was withdrawn in 2011, [81] making the spline drive obsolescent. The Phillips Screw Company". phillips-screw.com. Archived from the original on 2021-10-08 . Retrieved 2021-10-07. The tips are no worse (nor better) than the above-shown Wera, but for my hands, the Wera’s handle fits better, especially when I need to apply more torque for more than a few turns. I love the serrated blade, though – for easier fast spinning when the screw is loose 🙂A bit more on the cycling topic (and a further – digression of the digression 🙂 ) – I remember using bicycle gearing analogy to explain to my class-mates how automobile transmission works, and why it is important. For me it was a revelation of how important and useful good analogies can be for explaining stuff. This screw drive is often referred to as an improved version of the Phillips drive. Instead of the Phillips’ pointed tip, tapered flanks, and rounded corners, a Pozidriv has a blunt tip, parallel flanks, and an additional small rib between each slot. This allows for increased grip between the bit and fastener.