Factory supply GB6187 locking hex flange self locking nut M6 – M20

Easy To Use: There is a wide flange at one end of the flange nut, which increases the bearing surface of the nut and is not easy to loosen.Serrations help grip the material surface for easy installation and provide mild vibration resistance.
Premium Material: Serrated flange hex lock nuts made of 304（18-8）stainless steel, firm and corrosion resistant, can be used indoors and outdoors or in humid environments.