Simfix
M20 X 90 Hex Socket Countersunk 2 Pack ISO 10642 A4 Stainless Steel
- RRP
- £31.74
This M20 x 90mm socket countersunk screw is manufactured to ISO 10642 in A4 stainless steel (316 grade). ISO 10642 specifies a 90 degree countersunk head driven by an internal hexagon socket, allowing the head to finish flush with the work surface. Property class A4-070 indicates a minimum tensile strength of 700 MPa - stronger than standard A4-50 and suited to structural fixings where higher clamping force is needed. The countersunk head draws into a matching 90 degree seat and finishes level with the surface, leaving nothing to catch on while still taking the higher torque an internal socket allows.
Typical applications
- Flush fixings where a protruding head would obstruct or snag
- Machine guards, panels, and access covers
- Furniture and shopfitting where appearance matters
- Sliding or moving assemblies needing a clear surface
Available in packs of 2 to 10, with free next-day UK delivery on orders over £50 and 30-day no-quibble returns.
- RRP
- £31.74
This M20 x 90mm socket countersunk screw is manufactured to ISO 10642 in A4 stainless steel (316 grade). ISO 10642 specifies a 90 degree countersunk head driven by an internal hexagon socket, allowing the head to finish flush with the work surface. Property class A4-070 indicates a minimum tensile strength of 700 MPa - stronger than standard A4-50 and suited to structural fixings where higher clamping force is needed. The countersunk head draws into a matching 90 degree seat and finishes level with the surface, leaving nothing to catch on while still taking the higher torque an internal socket allows.
Typical applications
- Flush fixings where a protruding head would obstruct or snag
- Machine guards, panels, and access covers
- Furniture and shopfitting where appearance matters
- Sliding or moving assemblies needing a clear surface
Available in packs of 2 to 10, with free next-day UK delivery on orders over £50 and 30-day no-quibble returns.
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Complete the fixing
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M20 X 90 Hex Socket Countersunk ISO 10642 A4 Stainless Steel
Total for selected
This M20 x 90mm socket countersunk screw is manufactured to ISO 10642 in A4 stainless steel (316 grade). ISO 10642 specifies a 90 degree countersunk head driven by an internal hexagon socket, allowing the head to finish flush with the work surface. Property class A4-070 indicates a minimum tensile strength of 700 MPa - stronger than standard A4-50 and suited to structural fixings where higher clamping force is needed. The countersunk head draws into a matching 90 degree seat and finishes level with the surface, leaving nothing to catch on while still taking the higher torque an internal socket allows.
Typical applications
- Flush fixings where a protruding head would obstruct or snag
- Machine guards, panels, and access covers
- Furniture and shopfitting where appearance matters
- Sliding or moving assemblies needing a clear surface
Available in packs of 2 to 10, with free next-day UK delivery on orders over £50 and 30-day no-quibble returns.
*Photos, diagrams and other images are for illustration only and may not show the exact item supplied. Simfix reserves the right to alter or replace any photo, diagram or image at any time at its sole discretion.
**Orders that cannot be split will be rounded up to the next full pack or box quantity.
Simfix reserves the right to change quantities, stock levels and prices at any time. We accept no liability for the accuracy of dimensional data, DIN/ISO references, technical data, customs tariff codes or EAN barcodes.
| Fastener style | Countersunk screw with hex socket drive |
|---|---|
| Standard | ISO 10642 |
| Material | A4 stainless steel (316) |
| Property class | A4-070 |
| Thread size | M20 |
| Thread pitch | 2.5 mm (coarse) |
| Length | 90 mm |
| Head type | Countersunk Flat Head |
| Drive type | Hex socket |
| Surface finish | Plain (no plating) |
| Recommended use | Marine |
RoHS and REACH compliant.
How do I choose between A2 and A4 stainless steel?
A2 (304) stainless steel suits most indoor, outdoor and workshop jobs. Choose A4 (316) marine grade for coastal, marine, poolside or other chloride-rich environments.
How do I make sure I order the right size?
Check the size in the product title and the standard, material and dimensions in the Product Specification tab. In M8 x 30, M8 is the thread diameter and 30 is the length in millimetres. See our size guide if you need more help.
When will my order arrive?
Orders placed before 3:30pm Monday-Friday are typically dispatched the same working day and every order is tracked. Next-day delivery is free over £50, or £5.50 below that threshold. Full options are shown at checkout.
What if I order the wrong item?
Email contact@simfix.com within 30 days of delivery with your order number. We will help arrange a refund or replacement. See our refunds information for the full process.
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