Item Specifications UPC 842176171012 Package Quantity 50 Size 1/4"-20 x 1-1/4" 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 Full Thread Length 1-1/4" Thread Length Dec. 1.25" 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 5150-6105 SKU 3GBC904C0104