4 150 304 LocknutThe 4 150 304 Locknut is a threaded fastening component designed to secure pipe fittings, conduit, or threaded rods, preventing loosening due to vibration, pressure, or mechanical movement. Made from 304 stainless steel, it provides excellent corrosion resistance and durability, making it ideal for industrial, plumbing, and mechanical applications. 150# pressure rating suitable for low to medium pressure applications in industrial piping systems.