Jiashan Yujin Fastener ISO9001-2008 quality management system certification. Our production: We specialize in the manufacture of washers and stampings. All our products meet Din and ISO standards and we stock a wide range of standard washers: flat washers, grower washers, cogged washers etc. We also supply nuts. In addition, we specialize in the manufacture of customized washers, threaded washers and a range of stampings.Dimensions: we manufacture from 7 mm. to 100 mm. external diameter and from 0.70 mm. to 10 mm. thickness.Durability: we can supply our products in different grades of durability: 100 HV, 200 HV, 300 HV...Finishes: our products come in a wide range of finishes depending on customer requirements and include Polished, Zinc Plated, Yellow Zinc Plated, Galvanized, Geomet, etc.