Item Specifications UPC 842176192710 Package Quantity 100 Drive Style External Hex Drive Size 7/16" Inch / Metric Inch Thread Size 1/4"-28 Thread Class Class 2B Coarse / Fine Fine Threads Per Inch (TPI) 28 Height 7/32" 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 5150-7670 SKU 848078