Countersunk Cap M4 x 30mm Black Gr.10.9 DIN 7991

Countersunk Cap Screw
Hexagon Head
Black Metric
High Tensile Grade 10.9
Dia: M4
Pitch: 0.7
Length: 30mm
BS 2470
Key Size: 2.5mm
A DIN 7991 countersunk head socket screw is a metric fastener designed to sit flush with or below the surface of a material. It is technically a standard socket countersunk head screw, and while it is sometimes colloquially referred to as a "shoulder cap screw" in custom variants, the standard DIN 7991 specification does not include a precision-ground shoulder.