Countersunk screw 3.9x50 DIN 7981 (pkg. 1000pcs) Tech-Krep/Zitar 956133

The screw features a cross-recessed head, which allows for reducing or completely eliminating the possibility of bit and screwdriver slippage during assembly. DIN 7981 self-tapping screw for fastening thin metal sheets, with a cross-recess Pz or Ph, cylindrical head with a sphere, C-type shape with a pointed end. The screw can be installed into the surface of the material without pre-drilling a hole. Installation is performed with cross-recessed screwdrivers or power drills.