The Hillman Group The Hillman Group 180326 3/8-16 All Metal Grade C Lock Nut (100-Pack)

All Metal Lock Nuts are one piece, all-metal prevailing torque hex nuts with a conical top and a flat bottom bearing surface with chamfered corners | All Metal Lock Nuts are capable of withstanding severe vibration and shock loads | Zinc-plated for moderate corrosion resistance | Product Dimension: 2.93" x 3.0" x 1.87"