Phillips and Pozidriv Screwdrivers
Screwdrivers and Bits
Cross-head screwdrivers cover the two profiles Phillips (PH) and Pozidriv (PZ), which look similar but are not interchangeable. Phillips has tapered flanks and cams out of the screw head under overload, while Pozidriv carries additional ribs between the wings, transmits more torque and stays seated in the head. The relevant standards are ISO 8764-1 for Phillips and DIN ISO 8764 for Pozidriv; the range covers sizes PH0 to PH2 and PZ0 to PZ2 with blade lengths from 25 to 300 mm. The category holds 191 items, the leading brands are Wiha, Bernstein and C.K.
| Feature | Phillips PH | Pozidriv PZ |
|---|---|---|
| Standard | ISO 8764-1 | DIN ISO 8764 |
| Flank form | tapered, no additional ribs | steeper, with four additional ribs |
| Behaviour under overload | cams out of the head | stays seated, higher torque |
| Sizes in the range | PH0 to PH2 | PZ0 to PZ2 |
| Identification on the screw | plain cross | cross with four fine lines between the wings |
Typical applications: Sheet metal and self-tapping screws in enclosure construction; terminal blocks with PZ heads in control cabinets; mounting of PCB holders and spacer bolts; assembly of workbenches and production frames; work on live parts using the VDE version; assembly work inside the EPA with a dissipative handle.
