Countersunk Socket Cap Screw (DIN 7991 / ISO 10642)
Countersunk socket cap screws have a flat, conical head that sits flush in a countersunk hole, with a hex socket drive in the head. Used wherever a smooth, flush surface is required after fastening — fixtures, panels, machine slides.
Specifications
| Standards | DIN 7991, ISO 10642 |
|---|---|
| Head Angle | 90° standard |
| Property Class | 10.9, A2-70 stainless |
| Diameter | M3 – M20 |
| Surface Finish | Black oxide, Stainless |
Frequently Asked Questions
How do I prepare a countersink for a DIN 7991 screw?
Drill the through-hole to clearance size for the screw diameter, then countersink with a 90° countersink tool to a depth that matches the head height of the screw. Specific countersink diameter and depth values are in the DIN 7991 standard or any general engineering handbook.
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