7G x 16mm Raised Head Screws Nickel Phillips Head (Box/1000)

7G x 16mm Raised Head Screws Nickel Phillips Head (Box/1000)

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Screw Head - Pozidrive

The Pozidriv (sometimes incorrectly spelled "Pozidrive") is an improved version of the Phillips screw drive. It is designated "Type IA" by ANSI standards.

The Pozidriv was patented by GKN Screws and Fasteners in 1962.It was specifically designed to allow more torque to be applied and greater engagement than Phillips drives. As a result, the Pozidriv is less likely to cam out. It is similar to, and compatible with, the Supadriv screw drive.

Pozidriv screwdrivers are often designated using the letters "PZ" followed by a size code of 0, 1, 2, 3, 4 or 5 (in order of increasing size).The numbers do not necessarily correspond to nominal screw size numbers.

Pozidriv screws have a set of radial indentations (tick marks) set at 45° from the main cross recess on the head of the screw, which makes them visually distinct from Phillips screws.

While a Phillips screwdriver has slightly tapered flanks, a pointed tip, and rounded corners, a Pozidriv screwdriver has parallel flanks, a blunt tip, and additional smaller ribs at 45° to the main slots. The manufacturing process for Pozidriv screwdriver bits is therefore more complex than that for Phillips: while a Phillips screwdriver bit can be manufactured by cutting four simple slots, the Pozidriv screwdriver tip requires two machining processes at right angles for each slot.[citation needed]

Pozidriv and Phillips are broadly interchangeable, but may cause damage if incorrectly used. While Pozidriv screwdrivers fit Phillips screws, they may slip or tear out the Phillips screw head. Conversely, while Phillips screwdrivers will loosely fit and turn Pozidriv screws, they will cam out if enough torque is applied, potentially damaging the screw head or screwdriver.

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