Conquest 1" Grade C NE Nylon Insert Locknut, Coarse Thread - Plain | Qty. 75 (Carton)Grade C NE Nylon Insert Locknuts are durable locknuts made to handle frequent movement and vibration, thanks to a nylon insert that holds firm under pressure. Whether its machinery that rumbles or framing that flexes, these nuts help keep it all together. Theyre forged from high strength Grade C steel and come with a plain, uncoated finish ideal for dry, indoor settings where corrosion isnt a factor. The nylon insert works by generating friction