Item Specifications UPC 842176193823 Package Quantity 100 Drive Style External Hex Drive Size 1/4" Inch / Metric Inch Thread Size #3-48 Thread Class Class 2B Coarse / Fine Coarse Threads Per Inch (TPI) 48 Height .153" Material Steel Material Type Zinc Plated Steel Grade Grade 2 Finish Electro Zinc & Clear Specification 1 ASME : B18.16.6-2014 Proof Load 90,000 psi Core Hardness Rockwell C28 max Item Type Nuts Nut Type Nylon Lock Nut Product Code 5150-15700 SKU 305003