Item Specifications UPC 842176171135 Package Quantity 25 Size 1/4"-20 x 6-1/2" Head Style Round Head Diameter 0.594" Head Height 0.145" Inch / Metric Inch Thread Size 1/4"-20 Thread Dia. 0.250" Thread Class Class 2A Coarse / Fine Coarse Threads Per Inch (TPI) 20 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 ASTM : A307 Specification 2 ASTM : A153 Specification 3 ASME : B18.5 Tensile Strength 60,000 PSI Core Hardness Rockwell B69 Item Type Bolts Product Code 5150-6165 SKU 3GBC904C0608