Description
Hex Socket Cap Screw M8x45 SS A4 ISO 4762 — BOLTON SKU 70523.
About the 5403330 Socket Cap Screw, M8 x 45
The Hex Socket Cap Screw M8x45 SS pairs the ISO 4762 socket head cap screw form with an extended 45 mm nominal length on the M8 coarse thread (1.25 mm pitch). ISO 4762 defines the cylindrical internal-hexagon head used on this fastener family. At 45 mm, this screw reaches through thicker joint stacks — spacers, multiple plates or deep counterbores — while keeping the same 13 mm head diameter, 8 mm head height and 6 mm A/F hex drive as shorter M8 sizes, so tooling and counterbore preparation remain unchanged across lengths. The A4 austenitic stainless grade (316 type, molybdenum-bearing) provides corrosion resistance suited to marine and chemically exposed installations. Note that longer ISO 4762 sizes are normally part-threaded; confirm thread length against your grip requirement when submitting the RFQ.
Key specifications
| Standard | ISO 4762 (hexagon socket head cap screw) |
|---|---|
| Thread | M8, coarse (1.25 mm pitch) |
| Nominal length | 45 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
The 45 mm length is typically specified where an M8 fastener must pass through a thick flange, a stand-off or stacked components before engaging its tapped hole or nut — common in jig and fixture builds, pump and gearbox mounting, and equipment skids installed in corrosive or outdoor environments where A4 stainless is mandated.
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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