... : 4, 6 Finish: natural, lpating Zinc, coating Specifications of Hex nylon lock nuts: 1.StandardASME B18.16.6, DIN985, DIN982,GB ... 8, Grade 105.Surface treatmentblack oxide, zinc plating(white, yellow, black colour), nickel plating, chromate plating, HDG, Dacromet. 6.Body Appearance ...