Spring Pin System of Measurement Inch Pin Diameter 1/4 in Pin Type Slotted Material Steel Material Grade/Class Ungraded Finish Plain Usable Length 3 1/4 in End Type Chamfered Chamfer Diameter 0.245 in Wall Thickness 0.048 in Fits Minimum Hole Diameter 1/4 in Fits Maximum Hole Diameter 1/4 in Shank Length 3 1/4 in Maximum Chamfer Length 0.065 in Minimum Chamfer Length 0.012 in Nominal Diameter 1/4 in Standards ASME B18.8.2 Shank Length Tolerance +/-0.030 in