... bolts, rivets,studs,washers,standoffs,spacers,pins, shafts,and standard PEM,RAF electronic hardware & components.5) used ... bolts, rivets,studs,washers,standoffs,spacers,pins, shafts,and standard PEM,RAF electronic hardware & components.5) used ... 1.5mm.Thread size #2 to 1/4" and M2 to M6.1. Standards: ASTM B18.2.2; DIN931, DIN933, DIN558, ... , zinc, hot dip galvanizing, dacromet, etc male-female standoff