Liaocheng Hongyu Metal Co., Ltd mainly produces any kind of washers, stamping parts and some standard nuts(DIN943) and bolts(DIN933). In 2003, we set our own trade company in Qingdao.
As follows washers (DIN, USS, SAE, BS, NFE, JIS, KS, special kinds, etc) and stamping parts for constrcution, and marble. The surface are five kinds: Plain, Zinc plated, Hot DIP Galv, Yellow zinc plated, Black and so on.
The standards about washers like this: Not only DIN125, ...