Item Specifications UPC 842176172378 Package Quantity 10 Size 5/16"-18 x 6-1/2" Head Style Hex Head Height 7/32" Drive Style External Hex Drive Size 1/2" 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 Partial Thread Length 6-1/2" Thread Length Dec. 6" Material Steel Material Type Hot Dip Galvanized Steel Grade Grade 307A Finish Hot Dip Galvanized Specification 1 ASME : B18.2.1 Specification 2 ASTM : A307 Tensile Strength 60,000 PSI Core Hardness Rockwell B69 Item Type Bolts Product Code 5150-12325 SKU 3GBM905C0608