Nuts have internal machine threads, for use with machine thread bolts and screws.We have a large selection of nuts.Different materials and different type.Aluminum material,stainless steel materials,steel materials,titanium materials etc are provided. Flange lock nuts,Flange serrated lock nuts,self-locking nuts,hex nuts etc are our popular types.Any sizes and colors could be customized. If you don`t see the nuts you required in our catalog, please send us an RFQ with your specificationns. We could produce or customize them to fulfill your unique needs including anodised colors.