Suzhou RONGYUAN is a specializing in tailor-made industrial parts of the plant����¯�¿�½������¯����¯�¿�½������¼������¯������¿������½Foreign companies such as McMASTER-CARR, Jergens, Carr Lane, Vlier, BERG, de-sta-co, nordex, Reid, MISUMi, Is specializing in manufacturing and the provision of US-made with stainless steel hexagonal screws, spring plungers , ball plungers ball, nylon point set screws, decking screws, screw plug play, fast-lock bolt factory. Materials and surface treatment: Pressure to verify: a super-cold forging system, the melting pot to deal with the steel bars, produced in a patent to be obtained in steel high strength, wear resistance, good machining performance and heat deformation performance, reliable and durable. Stainless steel :17-4H, 300 series Alloy: 4140, 4130, SCM435, etc. Low-carbon steel: steel cutting 1215, 1018 Black iron oxide: *****-C-13924B and Ams-2485 Black Plating: Mil.Spec., Mil-A-8625, Type 2, Class and AMS-2472 Passivation: QQ-P-35 Thread rating: 2A-UNC, 6G Customers can request the specified materials and surface treatment Quality Guarantee: Our quality system through ISO900: 2000 witnesses.