Description
ISO 4762 Screw M10x40 Class 12.9 Steel — BOLTON SKU 57242.
About the ISO 4762 Screw M10x40 Class 12.9 Steel
The ISO 4762 Screw M10x40 Class 12.9 is a high-strength alloy-steel hexagon socket head cap screw, M10 thread by 40 mm nominal length. Property class 12.9 to ISO 898-1 denotes a nominal tensile strength of 1200 MPa with a minimum 0.2% proof stress of 1100 MPa — the highest of the common metric property classes and the usual grade for heavily loaded socket cap screws. Dimensionally, the M10 size of ISO 4762 (equivalent to DIN 912) has a 1.5 mm coarse thread pitch, a 16 mm maximum head diameter, a 10 mm head height and an 8 mm internal hexagon drive. The cylindrical head is designed to sit in a counterbore, allowing high preload to be applied with a hex key or socket bit in confined locations where external-hex tooling cannot fit.
Key specifications
| Standard | ISO 4762 (equivalent to DIN 912) |
|---|---|
| Thread size | M10, coarse pitch 1.5 mm |
| Nominal length | 40 mm |
| Head diameter | 16 mm max |
| Head height | 10 mm |
| Drive | 8 mm internal hexagon |
| Property class | 12.9 per ISO 898-1 (Rm nominal 1200 MPa; Rp0.2 min 1100 MPa) |
| Material | Alloy steel, quenched and tempered |
Typical applications
Class 12.9 M10 cap screws are specified for highly stressed bolted joints — machine-tool structures, dies and mould plates, gearbox and drive housings, and fixture clamping where maximum preload in a compact counterbored head is required. Correct tightening torque and, where applicable, controlled lubrication practice matter at this strength level and should be defined by the applicable joint design.
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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