Features: Hex nut with cold pressed flange, serate treated on the seat acts as a loosening stopper. The material is steel with trivalent chromate plating (light bluish color) for improved corrosion resistance. Used for tightening, tightening and securing screws Especially effective for preventing loosening Corrosion resistant compared to fabric. This product is compliant with environmental regulations such as RoHS. ■ Screws and nails in a small quantity pack in the specified package unit. Please check the quantity in total.