Item Specifications UPC 842176192611 Package Quantity 1 Drive Style External Hex Drive Size 3" Inch / Metric Inch Thread Size 2"-4-1/2 Thread Class Class 2B Coarse / Fine Coarse Threads Per Inch (TPI) 4.5 Height 1-23/32" Material Steel Material Type Zinc Plated Steel Grade Grade 2 Finish Electro Zinc & Clear Specification 1 ASME : B18.2.2-2010 Proof Load 68,000 psi Core Hardness Rockwell B68 - C32 Item Type Nuts Nut Type Hex Nut Product Code 5150-7655 SKU 319400