Slotted vs. Torx Plus
Comparing 2 standards across 12 specifications. 12 key differences identified.
The Slotted drive (Flat Head / Flat Blade) is the original single-slot fastener drive geometry standardized under ISO 2380 and DIN 963. Operated with a flat screwdriver blade, it features no inherent centering or cam-out retention, making it susceptible to tool slippage and strictly limited to manual assembly and decorative restoration.
Torx Plus is an advanced evolution of the hexalobular star drive introduced by Textron Fastening Systems in the 1990s. Featuring squarer, elliptical lobes and a true 0-degree drive angle, it increases torque transmission capacity by up to 35% and extends assembly tool bit life by up to 100% in industrial manufacturing.
Specification Comparison Table
12 Parameters| Parameter / Spec | ||
|---|---|---|
|
Drive Geometry
|
Single linear rectangular slot through head center | 6 elliptical lobes with flattened lobe tips |
|
Standard Specifications
|
ISO 2380 (Screwdrivers) / DIN 963 / ASME B18.6.3 | — |
|
Self-Centering Capability
|
None (Driver freely slides laterally out of slot) | — |
|
Cam-Out Tendency
|
Extremely High (Tends to climb up and out of slot under torque) | — |
|
Power Tool Suitability
|
Unsuitable (High risk of workpiece scratching / bit slippage) | — |
|
Primary Modern Applications
|
Antique furniture restoration, electrical switch wallplates, plumbing fixtures | — |
|
Proprietary Standard
|
— | Acument Global Technologies (formerly Camcar Textron) |
|
Drive Angle
|
— | 0 degrees (true perpendicular tangential drive vector) |
|
Torque Transmission Gain
|
— | Up to 35% higher torque than standard Torx |
|
Tool Bit Lifespan Gain
|
— | 100% to 200% longer drive bit life |
|
Sizing Notation
|
— | IP (Internal Torx Plus: 1IP to 100IP) and EP (External Torx Plus) |
|
5-Lobe Security Variant
|
— | Torx Plus Security (5-lobe star with central tamper pin, 8IPR to 50IPR) |