... 304 or 316 spring nut;(Size: M6,M8,M10,M12,1/4",5/16",3/8",1/2");4.Competitive price and good quality ... ;5.OEM service available;6.Size:M6*6mm,M8*6mm, ... M8*8mm,M10*8mm,M10*9.1mm,M12*8mm,M12*9.1mm,M12 ... *11.9mm,1/4",3/8",5/16",1/2"; SS304 or SS316 M12(1/2") channel spring ...