Fasteners, Standard Parts, Nut manufacturer / supplier in China, offering JIS B 1185 Chinese Manufacturer M4 Carbon Steel Zinc Plated Butterfly Wing Nut Made in China, Custom Made Steel Zinc Coating Small and Large Size DIN 315 Thumb Decorative Casting Wing Butterfly Nut Made in China, Chinese DIN 7504 Cross Recessed Countersunk Head Tapping Drilling Screws and so on.