Hongyu Metal Co., Ltd is a fastener manufacturer, specializing in manufacturing washers(standard washers, special washers) and stamping parts. We also have factories in Korea and Malaysia.We export our products by our trade company--Qingdao DukYang Trade Co., ltd.

The standard washers incluce: Flat washers, square washers, spring washers, lock washers, taper washers and so on, in accordace with DIN125, DIN433, DIN440, DIN1440, DIN6916, DIN7349, DIN7989, DIN127, BS4320, USS, SAE, F/W, NF25513, ...