Stop Nut, Hillman, Zinc-Plated, All-Metal Fine 5/8 in x 18, Grade C, SAE

Hillman 180370 Stop Nut, Fine Thread, 5/8-18 Thread, Metal, Zinc, C Grade All metal lock nuts are nuts with a crowned top that is crimped to create the locking feature. These nuts are hardened to a Grade C strength level, which is equivalent to 150000 psi/min proof load strength. Grade C nuts are also recommended for use with A-325 structural bolts. Lock nuts provide excellent resistance to loosening in high vibration applications.

• Zinc-plated for moderate corrosion resistance
• All metal locknuts are capable of withstanding severe vibrations and shock loads
• Nut applies force against the bolt to help lock nut
• One-piece, all prevailing torque hex nuts with a conical top and a flat bottom bearing surface with chamfered corners
• Grade C nuts with SAE thread for finer adjustments