Item Specifications UPC 842176192819 Package Quantity 10 Drive Style External Hex Drive Size 7/8" Inch / Metric Inch Thread Size 9/16"-18 Thread Class Class 2B Coarse / Fine Fine Threads Per Inch (TPI) 20 Height 31/64" Material Steel Material Type Zinc Plated Steel Grade Grade 5 Finish Electro Zinc & Clear Specification 1 ASME : B18.2.2-2010 Proof Load 109,000 psi Core Hardness Rockwell C32 max Item Type Nuts Nut Type Hex Nut Product Code 5150-7720 SKU 848088