Description
Hex Cap Head Screw M3x12 A4 Stainless Steel DIN 912 — BOLTON SKU 57574.
About the Hex Cap Head Screw M3x12 A4 Stainless
The Hex Cap Head Screw M3x12 A4 is a miniature hexagon socket head cap screw in A4 stainless steel to DIN 912, the German designation dimensionally interchangeable with ISO 4762. At M3 the coarse thread pitch is 0.5 mm, the cylindrical head measures 5.5 mm in maximum diameter and 3 mm in height, and the screw is driven by a 2.5 mm hex key. The 12 mm nominal length equals four thread diameters, giving strong engagement margins in tapped aluminium or steel components. The cap-screw format packs the highest drive capability of the small socket-screw styles: the deep socket and full-height head accept more torque than button or countersunk equivalents of the same thread. A4 (316-type, molybdenum-bearing austenitic stainless) is the grade normally selected when chloride pitting is a risk — marine-adjacent sites, chemical splash zones and frequent washdown.
Key specifications
| Standard | DIN 912 (equivalent to ISO 4762) |
|---|---|
| Thread size | M3, coarse pitch 0.5 mm |
| Nominal length | 12 mm |
| Head diameter | 5.5 mm max |
| Head height | 3 mm |
| Drive | 2.5 mm internal hexagon |
| Material | A4 austenitic stainless steel (316 type, ISO 3506 family) |
Typical applications
M3 cap screws of this length assemble small mechanisms, PCB standoff stacks, sensor housings and precision fixtures where a counterbored head and positive hex drive are required at miniature scale. The A4 grade keeps such assemblies serviceable in corrosive atmospheres.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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