Carbon Steel Galvanized Butterfly Nut, Hand-Screwed Nut, Wing Nut Dongguan Top Hardware Co., Ltd. Base Info Model NO.:M3-M12Material:Carbon SteelType:Round HeadConnection:Common BoltHead Style:WingStandard:DIN, ANSI, GBGrade:4.8Transport Package:CartonOrigin:China Description Pre:DIN7991 Stainless Steel Hexagon Socket Countersunk Head Screwsstandard Fastener Next:Stainless Steel Self-Tapping Screw, Gypsum Bugle Head Black Drywall Screw