5/16"-18 UNC Hex Nuts

High-performance hex nuts manufactured for durability, precision, and reliable fastening performance 5/16"-18 UNC HEX NUT ASTM A194 Grade 8MA.

Nuts are machined from bar or hex stock, tapped to the thread class specified, and heat treated where the grade requires it. Heavy hex, jam, castellated, cap, seal and coupling patterns are turned in-house, so special dimensions cost no more than standard ones.

About the material: 316 stainless heavy hex nut for B8M studs — molybdenum-bearing for chloride and marine service, 80 ksi proof load. Read the A194 8M data page →