This part of JB/T 7647 specifies the dimensions, specifications and markings of type B guide pins of punch molds. This section applies to B-type guide pins of punch dies.
JB/T 7647.2-2008 Referenced Document
JB/T 7653 Die parts technical conditions*, 2020-12-09 Update
JB/T 7647.2-2008 history
2008JB/T 7647.2-2008 Pilot pins of stamping dies.Part 2:Pilot pins.Type B