Item Specifications UPC 842176193250 Package Quantity 1 Drive Style External Hex Drive Size 3" Inch / Metric Inch Thread Size 2"-12 Thread Class Class 2B Coarse / Fine Fine Threads Per Inch (TPI) 12 Height 1-23/32" 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 C26 - C36 Item Type Nuts Nut Type Hex Nut Product Code 5150-8020 SKU 306108