5/16"-18 Hex Flange Cone Locknut, Two Opposite Oval Lock, Grade G, Phosphate & Oil Finish

The 5/16"-18 hex flange cone locknut features a two‑opposite oval locking design that provides strong resistance to loosening under vibration and dynamic loads. Manufactured to Grade G specifications, it is suitable for structural and high‑strength applications. The integral flange distributes load evenly and eliminates the need for a washer, while the phosphate and oil finish offers initial corrosion protection and improved lubricity during installation. Ideal for automotive, industrial, and mechanical assemblies.