This standard specifies the structural type and size, technical requirements and markings of the hexagonal upper punch for cold heading GB 6170~6171 and GB 6175~6176 hexagonal nuts M1.6~M12 A type. This standard applies to the molds of automatic nut cold heading machines.
JB/T 4210.10-1996 history
2014JB/T 4210.7-2014 Cold heading dies for hexagon nuts.Part 7: Upper punches for hexagon upsetting
1996JB/T 4210.10-1996 Mold for cold heading hexagonal head nuts Upsetting hexagonal upper punch pin A type
JB/T 4210.10-1996 Mold for cold heading hexagonal head nuts Upsetting hexagonal upper punch pin A type was changed to JB/T 4210.7-2014 Cold heading dies for hexagon nuts.Part 7: Upper punches for hexagon upsetting.