... good quality; Metal stamping partGalvanized carbon steel spring nut(M6,M8,M10,M12): 1.Material:Galvanized steel;stainless steel 304 or ... good quality;5.OEM service available;6.Size:M6*6mm,M8*6mm,M8*8mm,M10*8mm,M10*9.1mm,M12*8mm,M12 ... we will quote you competitive price asap. spring nut(M6,M8,M10,M12,1/4",3/8",5/16",1/2")