M4 x 40mm Socket Countersunk Screws Hex Allen Screw Bolts 10.9 High Tensile DIN 7991 Pack of 100

Countersunk Socket Head Screws feature a countersunk head type, which essentially allows them to sit flush. The socket head of these screws, makes them ideal to use alongside Hex Drive Bits or Allen Key and Wrenches in particular.