Item Specifications UPC 842176193014 Package Quantity 50 Drive Style External Hex Drive Size 9/16" Inch / Metric Inch Thread Size 3/8"-16 Thread Class Class 2B Coarse / Fine Coarse Threads Per Inch (TPI) 16 Height 21/64" 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 5150-7900 SKU 306054