HIGH QUALITY STEEL - Stainless steel lock nuts are one of the highest forms of corrosion resistant metals, allowing them to outlast other lock nuts on the market today. today. The stainless steel lock nut is superior to the plain steel finish and provides good rust resistance. NUTS YOU CAN RELY ON - Our heavy-duty hex lock nuts are extra strong and are perfect for indoor and outdoor use. Highly resistant to rotation, preventing lock nuts from weakening and loosening under vibration and torque, which reduces holding force. Guaranteed to stay intact and in firm grip making it virtually indestructible. GREAT TO KEEP AROUND - Bolt Dropper Hex Lock Nuts are perfect for use in wood and wet environments. They are strong, corrosion resistant and will support all of your projects. NYLON INSERT - Lock nuts are also known as stop nuts. Locknuts are used for fastening to a bolt during mechanical joining of materials. The bolt threads in the nylon material are located at the top of the nut. The purpose of the nylon insert is to prevent shrinkage or loosening due to vibration. Color: silver Size: opposite side 18.67-19mm, no 1.75 mm, thickness 11.57-12 mm Scope of delivery: 10 pieces