The company is specialized in producing JBZQ4340-9 7, DIN9250, SCHNORR safety lock washers, single-sided embossed French lock washers, grounding washers, double-sided embossed butterfly lock washers, light type S and heavy type VS series lock washers. Main materials are high quality 65MN, SK5, 60Si2MnA, 50CrVA and 304 stainless steel; adopt environmental-friendly materials from domestic big factory and imported from other countries. Heat treatment and surface electroplating process flow are strictly controlled; make sure that product performance and quality keep the leading level in the industry and all the products conform to EU RoHs Directive and Sony standard. All the products are exported to Italy, Germany and other European and American countries and regions through many foreign trade companies. Common specifications M3-M36 are kept in stock, welcome the distributors to join us. Continuously developing JinYuanDa is your ideal partner and reliable professional high quality fastener manufacturer!