Pozidriv vs. Torx
Comparing 2 standards across 11 specifications. 11 key differences identified.
The Pozidriv drive (ANSI Type IA cross recess / ISO 4757) is an improved cruciform drive developed by GKN Screws and Fasteners in 1962. Identified by four secondary radial score lines etched at 45 degrees between the main cross blades, it features parallel, non-tapered sidewalls that eliminate cam-out and allow significantly higher torque transmission than Phillips.
Torx (standardized as Hexalobular Internal under ISO 10664) is a 6-lobed star-shaped screw drive system developed by Camcar Textron in 1967. Engineered with a low 15-degree drive angle and curved lobes, it eliminates cam-out entirely, delivers exceptional torque transfer, and drastically extends tool bit lifespan across automotive, computing, and construction hardware.
Specification Comparison Table
11 Parameters| Parameter / Spec | ||
|---|---|---|
|
Cam-Out Tendency
|
Extremely Low (Does not push driver out under high torque) | Zero (Radial drive force completely eliminates axial climb) |
|
Standard Specifications
|
ISO 4757 Type IA / BS 3529 / DIN 7962 | — |
|
Visual Identification
|
4 distinctive radial tick marks embossed at 45° between the main cross arms | — |
|
Flank Geometry
|
Parallel vertical sidewalls (zero taper angle, unlike Phillips 57° taper) | — |
|
Standard Sizing Tiers
|
PZ0, PZ1, PZ2 (dominant European carpentry size), PZ3, PZ4 | — |
|
Primary Geographical Usage
|
Dominant across European construction, cabinetry (IKEA furniture), and automotive | — |
|
International Standard
|
— | ISO 10664 (Hexalobular internal driving feature for bolts and screws) |
|
Drive Geometry
|
— | 6-pointed star with rounded circular lobes |
|
Drive Angle
|
— | 15 degrees (near-perpendicular torque vector) |
|
Common Sizing Tiers
|
— | T1–T5 (smartphones), T6–T10 (laptops/electronics), T15–T25 (wood/auto), T30–T50 (chassis/structural) |
|
External Variant
|
— | E-Torx (Inverted star socket for high-torque automotive bolts, E4 to E24) |