5/8"-18 Hex Flange Cone Locknut, Two Opposite Oval Lock, Grade G, Phosphate & Oil Finish

The 5/8"-18 hex flange cone locknut features a two‑opposite oval locking design that delivers strong resistance to loosening under vibration and dynamic loads. Manufactured to Grade G specifications, it is well suited for high‑strength and structural applications using fine threads. The integral flange evenly distributes clamping force and eliminates the need for a washer, while the phosphate and oil finish provides initial corrosion protection and improved lubricity during installation. Ideal for automotive, industrial, and mechanical assemblies.