5/16-18 Tuff-Torq® Hex Nut, Grade 8, Alloy Steel, 100/Pack

The Tuff-Torq Hex Nuts are crafted from high-strength Grade 8 alloy steel, featuring fine grain steel and a three-stage heat treating process for exceptional durability. They offer full finished nut dimensions, improved torque reliability, and greater load consistency. Identified by six equally-spaced radial lines and Lawson logos, these nuts match the strength of Tuff-Torq Cap Screws for a cohesive fastening system. They meet SAE J995 Grade 8 strength requirements and ANSI Class 2B thread fit standards, ensuring reliable performance and a precise fit.