Dormer F312 M16X1.50MM HSS Fine Die Nut BS 1127:1950

Bright finish - prevents work piece material from sticking to the cutting edges Premium HSS material - high speed steel provides superior performance and extend tool life Die Nut - designed for repairing damaged external threads by re-cutting the original thread form 6g tolerance - designed to create accurate screw threads to 6g tolerance Hand die - should only be used for repairing threads by hand with the appropriate spanner