Dowel Pin Pin Type Flat Vent Pull Out Material Steel Material Grade/Class Ungraded Finish Plain Pin Diameter 5/8 in Outside Diameter Tolerance +0.0001/+0.0003 in Thread Size 5/16 In.-18 Rockwell Hardness C58 Product Type Dowel Pin Shank Length 1 1/2 in System of Measurement Inch Nominal Diameter 5/8 in Standards ASME B18.8.2 Manufacturer Location Made in USA Dimensional Standards ASME B18.8.2