HB 3687-1986 Short shank machine, hand screw tap with rear leading part for regular screw thread of dead hole in ordinary steel machining d=6~11mm (English Version)
This standard is applicable to machines with back guides and hand taps for processing ordinary steel through-hole and non-through-hole ordinary threads (GB192~193-81, GB196~197-81) that have requirements for verticality, positioning and coaxiality.
HB 3687-1986 history
1986HB 3687-1986 Short shank machine, hand screw tap with rear leading part for regular screw thread of dead hole in ordinary steel machining d=6~11mm