Item Specifications UPC 842176153636 Package Quantity 25 Size 5/16"-18 x 5/8" Head Style Round Head Diameter 0.719" Head Height 0.176" Inch / Metric Inch Thread Size 5/16"-18 Thread Dia. 0.3125" Thread Class Class 2A Coarse / Fine Coarse Threads Per Inch (TPI) 18 Thread Coverage Full Thread Length 5/8" Thread Length Dec. 0.625" Material Stainless Steel 18-8 Finish Plain Specification 1 ASME : B18.5 Tensile Strength 70,000 PSI Core Hardness Rockwell B70 Item Type Bolts Product Code 5150-5550 SKU 4061448