Item Specifications UPC 842176193007 Package Quantity 100 Drive Style External Hex Drive Size 1/2" Inch / Metric Inch Thread Size 5/16"-24 Thread Class Class 2B Coarse / Fine Fine Threads Per Inch (TPI) 24 Height 17/64" Material Steel Material Type Zinc Yellow-Chromate Plated Steel Grade Grade 8 Finish Electro Zinc & Yellow Specification 1 ASME : B18.2.2-2010 Proof Load 150,000 psi Core Hardness Rockwell C24 - C32 Item Type Nuts Nut Type Hex Nut Product Code 5150-7895 SKU 306080