ISO 8021:1986

Round punches with cylindrical head and straight shank

Lays down the basic dimensions and tolerances in millimetres for theses round punches in the diameter range 1 to 32 mm. Gives matrial and ahrdness as examples, and specifies the designation of punches. The main use of punches defined in ISO 8021 is for punching holes in steel sheet or in sheet of other materials.