Item Specifications UPC 842176102689 Package Quantity 10 Size 1/4"-20 x 4-1/4" Head Style Socket Cap Head Diameter 3/8" Head Height 0.250" Drive Style Allen Hex Key Drive Size 3/16" Inch / Metric Inch Thread Size 1/4"-20 Thread Dia. 0.250" Thread Class Class 3A Coarse / Fine Coarse Threads Per Inch (TPI) 20 Thread Coverage Partial Thread Length 4-1/4" Thread Length Dec. 1.31" Material Stainless Steel 18-8 Finish Plain Tensile Strength 70,000 PSI Core Hardness Rockwell B70 Item Type Socket Screws Product Code 5150-26135 SKU 3SSCS94C404