... ,Stainless steel 3.Finish:Plain,Zinc plated 4.OEM Service DOME NUT1) Differents size:M3 to M482) Standard:GB,DIN,ANSI ... , white zinc, white blue zinc, and phosphating4) Grade:4.8 5.8 6.8 8.8 10.9 12.95) Material:carbon steel, brass,stainless ... fasteners can be supplied according to customers' drawings or samples dome nut