Mechanical properties, corrosion behaviour and the full dimensional range for this grade.
A2 Stainless Steel Torx and Torx-Plus Screwdriver Bits are supplied to ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70. Corrosion behaviour is good general corrosion resistance, the material is largely non-magnetic, and the usable service range is approx. -200 °C to +400 °C, subject to the property class and the joint. In practice this grade is the most common stainless group for indoor and general outdoor fasteners.
Property values are typical for the grade. Certified mechanical test data is available on request for production orders.
A2 Stainless Steel is not a material torx and torx-plus screwdriver bits are supplied in. Torx and Torx-Plus Screwdriver Bits are specified by nominal size, and this combination does not describe a part that exists.
See the Torx and Torx-Plus Screwdriver Bits product page for the specifications that do apply →
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
| Bit | Drive | Typical mating screw | Service |
|---|---|---|---|
| T10 | Torx | M3 hexalobular | electronics, appliance |
| T15 | Torx | M3.5 hexalobular | appliance, light assembly |
| T20 | Torx | M4 hexalobular | general assembly |
| T25 | Torx | M5 hexalobular | decking, general assembly |
| T27 | Torx | M5 u2013 M6 hexalobular | construction screws |
| T30 | Torx | M6 hexalobular | structural timber screws |
| T40 | Torx | M8 hexalobular | heavy assembly |
| T20 IP | Torx security (pin-in) | M4 tamper-resistant | public and outdoor equipment |
| T25 IP | Torx security (pin-in) | M5 tamper-resistant | public and outdoor equipment |
Select a material class to see the grades we supply it in. Each designation is listed with its ISO/EN, AISI/SAE, JIS and GB equivalents.
Where Torx and Torx-Plus Screwdriver Bits are used, and what decides the specification in each case. Stocked from T10 to T25 IP (nominal size).
This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.
Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.
Head dimensions and under-head radius checked at set-up and per shift.
Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.
Go / no-go ring gauges to ISO 965 tolerance class 6g.
Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.
Core hardness and tensile tested per lot to ISO 898-1.
Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.
Coating thickness and neutral salt spray hours to ISO 9227.
The practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint.
Only at the standard strength classes — A2-70 / A4-80 are roughly equivalent to class 7 steel; A4-100 reaches class 8.8. For class 10.9 or 12.9 strength, plated alloy steel is required.
A2 Stainless Steel Torx and Torx-Plus Screwdriver Bits are largely non-magnetic.
A2 Stainless Steel Torx and Torx-Plus Screwdriver Bits provide good general corrosion resistance with a service range of approx. -200 °C to +400 °C, subject to the property class and the joint.
Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.
