Self-tapping lock screw

The self-tapping lock screw for coarse thread screw series, ordinary thread specification for M3 ~ M12mm. Self-tapping lock screw threads of the screw is arc triangle section. The screw by the surface hardening and can be turned into black or non-ferrous metal materials, prefabricated bore (made) drilling, cutting, or die casting, extrusion forming internal thread, when screw thread in all don't make it without the threaded rod of diameter can be made equal to or less than three cylindrical or prismatic circle.

Self-tapping lock screw with low twist into the torque, high locking performance. Our goods in the standard fastener products varieties of self-drilling screw with GB/T6560 (cross trough pan head), GB/T6561 (philips countersunk head), GB/T6562 (philips oval head), GB/T6563 (hexagonal), GB/T6564 flower-like cylinder head (Allen) five series.