Item Specifications UPC 842176159195 Package Quantity 25 Size 5/16"-18 x 4-1/2" Head Style Flat Counter Sink Angle 82 Degree Head Diameter 0.612" Head Height 0.205" Drive Style Allen Hex Key Drive Size 3/16" Inch / Metric Inch Thread Size 5/16"-18 Thread Dia. 0.3125" Thread Class Class 3A Coarse / Fine Coarse Threads Per Inch (TPI) 18 Thread Coverage Full Thread Length 4-1/2" Thread Length Dec. 4.302" Material Stainless Steel 18-8 Finish Plain Specification 1 ASME : B18.3 Tensile Strength 70,000 PSI Core Hardness Rockwell B70 Item Type Socket Screws Product Code 5150-8675 SKU 3SSSF95C408