Description
ISO 4762 Screw M6x20 — BOLTON SKU 53223.
About the ISO 4762 Screw M6x20
ISO 4762 is the international standard for hexagon socket head cap screws with coarse-pitch threads, from M1.6 to M64, in product grade A. The catalogue reference iso_4762_screw_m6x20 identifies the M6 × 20 mm size: an M6 coarse thread with a 1 mm pitch and a 20 mm nominal length measured under the head. For M6, the standard gives a head diameter of 10.00 mm maximum, a head height of 6.0 mm maximum and minimum 5.7 mm, and a 5 mm nominal hexagon socket. The cylindrical head and internal drive allow the screw to be seated in a counterbore below the surface of the joint. ISO 4762 permits steel property classes 8.8, 10.9 and 12.9 and stainless grades A2 and A4; the grade for this line is confirmed at quotation.
Key specifications
| Attribute | Value |
|---|---|
| Standard | ISO 4762 (product grade A) |
| Fastener type | Hexagon socket head cap screw |
| Thread | M6 coarse, pitch 1 mm |
| Nominal length | 20 mm |
| Head diameter | 10.00 mm max |
| Head height | 5.7–6.0 mm |
| Drive | 5 mm hexagon key |
| Grades covered by the standard | Steel 8.8 / 10.9 / 12.9; stainless A2 / A4 |
Typical applications
M6 × 20 mm is a general machine-assembly size, used for bolting brackets, covers, motor and gearbox flanges and machined blocks where a through-hole and tapped hole combination is around 20 mm deep. The 5 mm hexagon drive delivers higher torque than a cross-recess screw of the same size without the risk of cam-out, and the small head footprint suits joints where there is little room for a hexagon-headed bolt and a spanner.
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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