Item Specifications UPC 842176193083 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 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 5150-7935 SKU 306088