Description
91290A203 Socket Head Cap Screw M6x40 Class 12.9 Steel ISO 4762 — BOLTON SKU 66740.
About the 91290A203 Socket Head Cap Screw M6x40
Reference 91290A203 identifies a hexagon socket head cap screw made to ISO 4762 with an M6 coarse thread and a nominal length of 40 mm under the head. This 91290a203 screw m6x40/12 9 iso item is supplied in alloy steel to property class 12.9, the highest class in the ISO 898-1 range commonly stocked for socket screws, which gives a substantially higher proof and tensile capability than a class 8.8 screw of the same size and allows a higher design preload in the joint. ISO 4762 sets the head geometry for the M6 size at a 10 mm head diameter and a 6 mm head height, driven by a 5 mm hexagon key. Because class 12.9 screws are high-strength alloy steel rather than stainless, corrosion protection depends on the finish supplied and should be specified with the enquiry.
Key specifications
| Part reference | 91290A203 |
|---|---|
| Type | Hexagon socket head cap screw |
| Standard | ISO 4762 |
| Thread | M6 × 1.0 (coarse) |
| Nominal length | 40 mm |
| Property class | 12.9 (ISO 898-1) |
| Material | Alloy steel |
| Head diameter | 10 mm |
| Head height | 6 mm |
| Hex key size | 5 mm |
Typical applications
Class 12.9 M6 cap screws at 40 mm length are used in machine-build and structural sub-assembly work where a compact fastener must carry a high clamp load: jig and fixture bodies, tooling plates, bearing and gearbox housings, and clamped joints that rely on friction rather than shear pins. The 40 mm length suits a stack of plates or a spacer arrangement seating into a tapped hole. The counterbore-friendly cylindrical head keeps the fastener below the working surface.
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).
Browse more in MIL-Spec & Coded Fasteners.
Reviews
There are no reviews yet.