Spring Pin System of Measurement Metric Pin Diameter 4 mm Pin Type Slotted Material Steel Material Grade/Class Grade 1070/Grade 1080 Finish Plain Usable Length 12 mm End Type Chamfered Wall Thickness 0.8 mm Fits Minimum Hole Diameter 4 mm Fits Maximum Hole Diameter 4.12 mm Shank Length 12 mm Maximum Chamfer Length 0.65 mm Minimum Chamfer Length 0.65 mm Nominal Diameter 4 mm Shank Length Tolerance +/-0.500 mm Product Type Spring Pin Rockwell Hardness HV 420-520