... lock nuts din 985 Material: cabon steel, stainless steel Grade: 4, 6 Finish: natural, lpating Zinc, coating Specifications of Hex nylon lock nuts ... ), 35#steel, S20C,AISI4142,AISI4140, SCM435, 45# steel, stainless steel:sus201, sus303, sus304 ... treatmentblack oxide, zinc plating(white, yellow, black colour), nickel plating, chromate plating, HDG, ... per need. And can offer with salt spray checking report.8. ...