... fastener Name: hex nut with internal thread and castle screw Ability for the material of this kind of ... C60600,C17200,etcAlumimum100,5052,6061,6063,etcAbility for the surface finish: ElectroplateZinc plated(while,colour,dacroment ... The plant has built for about 20 years,we have our own way to supply youthe high quality products with ... avoid lots ofrisks. hex nut with internal thread and castle screw