DIN 7991 Countersunk Socket Screw

90° countersunk socket screw that sits flush with the surface.

DIN 7991 screws are used for assemblies with no protrusion on the part surface. As the countersink angle is 90°, make sure the hole countersink is cut correctly; otherwise concentrated load forms under the head.

Usage and selection tips

The values in the dimension table are nominal ISO/DIN sizes; manufacturing tolerances are given on the relevant page of the standard. For stock status, special lengths and coatings, use the sample request form or talk to our sales team.

Dimension table (ISO)

M6dk = 12 · k = 3,3 · s = 4
M8dk = 16 · k = 4,4 · s = 5
M10dk = 20 · k = 5,5 · s = 6
M12dk = 24 · k = 6,5 · s = 8

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DIN 6921 Hex Flange Bolt

Flanged automotive bolt requiring no washer.

Standard
DIN 6921 / ISO 4162
Product family
Flange bolt
Material
Carbon / alloy steel
Strength class
10.9
Largest thread diameter
16 mm

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