Item Specifications UPC 842176192468 Package Quantity 10 Drive Style External Hex Drive Size 15/16" Inch / Metric Inch Thread Size 5/8"-18 Thread Class Class 2B Coarse / Fine Fine Threads Per Inch (TPI) 18 Height 35/64" Material Steel Material Type Zinc Plated Steel Grade Grade 2 Finish Electro Zinc & Clear Specification 1 ASME : B18.2.2-2010 Proof Load 60,000 psi Core Hardness Rockwell B68 - C32 Item Type Nuts Nut Type Hex Nut Product Code 5150-7575 SKU 319600