Description
1 2 20 x 1 3 4 Grade 8 Hex Cap Screw Plain Domestic USA (275) 12" Long Boy Drill Bits permanent and semi permanent location of permanent and semi permanent location of parts on shafts with hardness differential of 10 15 Rockwell C points and where cutting in of cup edge on the shaft is acceptable Typical hardness is HRC 24 35 for diameters up to 1 1 2 inches