Description
ISO 7380 Hexagon Socket Button Head Screw M4x12-A4 — BOLTON SKU 56938.
About the ISO 7380 Hexagon Socket Button Head Screw
An M4 x 12 mm button head socket screw in A4 stainless steel to the ISO 7380 series (hexagon socket button head screws with reduced loadability). The M4 size uses a 0.7 mm coarse pitch, a 7.6 mm diameter domed head standing 2.2 mm proud of the surface, and a 2.5 mm hex key drive. Compared with the 16 mm sibling BOLTON also lists, this 12 mm length is the tidier option for thin-panel joints and shallow tapped bosses, keeping thread protrusion to a minimum. As a reduced-loadability design, the ISO 7380 Hexagon Socket Button Head pattern accepts less torque and preload than a full-height cap screw of the same thread, so it is selected for finish, clearance and safety-to-touch rather than structural clamping. The A4 material class is the molybdenum-bearing 316-type austenitic stainless of ISO 3506, resisting chloride pitting better than A2.
Key specifications
| Standard | ISO 7380-1 (button head screws, reduced loadability) |
|---|---|
| Thread size | M4, coarse pitch 0.7 mm |
| Nominal length | 12 mm |
| Head diameter | 7.6 mm |
| Head height | 2.2 mm |
| Drive | 2.5 mm internal hexagon |
| Material | A4 austenitic stainless steel (316 type, ISO 3506 family) |
Typical applications
Typical uses are fastening access panels, guards, covers and extrusion accessories where a low, rounded head avoids snagging cables or clothing. The 12 mm length works well through sheet or thin plate into tapped members and T-nuts, with A4 covering humid or salt-exposed installations.
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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