Bolt, Nut manufacturer / supplier in China, offering DIN315 Hardware Accessories 304 Stainless Steel Wing Nuts M3-M10 Hand Tighten Butterfly, High Strength Zinc Plated DIN315 Wing Nut Butterfly Nut, Stainless Steel 304 316 Butterfly Nut with Torx Screw M3-M10 DIN315 Butterfly Nut Wing Nut and so on.