Dowel Pin Pin Type Flat Vent Pull Out Material Steel Material Grade/Class Ungraded Finish Plain Pin Diameter 1/2 in Outside Diameter Tolerance +0.0001/+0.0003 in Thread Size 1/4 In.-20 Rockwell Hardness C58 Product Type Dowel Pin Shank Length 1 in System of Measurement Inch Nominal Diameter 1/2 in Standards ASME B18.8.2 Manufacturer Location Made in USA Dimensional Standards ASME B18.8.2