Description
Hex Socket Cap Screw M8x25 SS A4 ISO 4762 — BOLTON SKU 70522.
About the 5403328 Socket Cap Screw, M8 x 25
This Hex Socket Cap Screw M8x25 SS is a metric hexagon socket head cap screw manufactured to ISO 4762, the international standard for socket head cap screws with cylindrical heads and internal hexagon drives. This variant carries an M8 coarse thread (1.25 mm pitch) with a 25 mm nominal length, and is produced in A4 austenitic stainless steel — the molybdenum-alloyed 316-type grade selected where resistance to chloride and marine atmospheres is required. Under ISO 4762 the M8 size uses a 13 mm maximum head diameter, an 8 mm head height and a 6 mm A/F internal hexagon, allowing the screw to be counterbored flush into the mating part and driven with a standard hex key or bit. Property class and any surface treatment can be confirmed at quotation stage against your drawing requirement.
Key specifications
| Standard | ISO 4762 (hexagon socket head cap screw) |
|---|---|
| Thread | M8, coarse (1.25 mm pitch) |
| Nominal length | 25 mm |
| Material | A4 austenitic stainless steel (316 type) |
| Head style | Cylindrical socket head, 6 mm A/F hex drive |
| Head dimensions (ISO 4762, M8) | Ø13 mm max × 8 mm high |
Typical applications
M8 × 25 socket cap screws in A4 stainless are chosen for structural clamping joints on equipment exposed to coastal, marine or wash-down environments — machine guarding, frames, brackets and enclosure assemblies where a counterbored flush head and strong corrosion resistance are both needed. The 25 mm length suits medium-thickness plate and flange stacks with full thread engagement in tapped holes.
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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