Description
Hex Cap Head Screw M4x12 A4 Stainless Steel DIN 912 — BOLTON SKU 57578.
About the Hex Cap Head Screw M4x12 A4 Stainless
The Hex Cap Head Screw M4x12 A4 is an M4 x 12 mm hexagon socket head cap screw in A4 stainless steel to DIN 912, interchangeable with ISO 4762. Standard M4 geometry applies: 0.7 mm coarse pitch, 7 mm maximum head diameter, 4 mm head height and a 3 mm hex key drive. The 12 mm nominal length is the mid-point of BOLTON’s M4 cap-screw listings — three diameters of available engagement, enough for reliable tapped joints in aluminium without the extra protrusion of the 16 mm size. Cap screws remain the strongest-driving of the socket-head family because the full-height cylindrical head carries a deep hexagon recess, and they seat cleanly in counterbores for flush assembly. The A4 grade is the 316-type molybdenum-alloyed austenitic stainless of ISO 3506, preferred over A2 wherever chloride pitting or crevice corrosion is a realistic failure mode.
Key specifications
| Standard | DIN 912 (equivalent to ISO 4762) |
|---|---|
| Thread size | M4, coarse pitch 0.7 mm |
| Nominal length | 12 mm |
| Head diameter | 7 mm max |
| Head height | 4 mm |
| Drive | 3 mm internal hexagon |
| Material | A4 austenitic stainless steel (316 type, ISO 3506 family) |
Typical applications
This size fastens equipment covers, brackets, connector shells and small mechanism plates into tapped members across general machine and enclosure work. In A4 it is routinely used on equipment for coastal plants, vessels and wash-intensive production areas.
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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