Manufacturing Processing Machinery, Sheet Metal Stamping, Springs manufacturer / supplier in China, offering 304 Stainless Steel Knock-Type Back Bolt/Triangular Card Expansion Bolt/Ceramic Knock-Type Back Bolt, Standard Spring Nut/T-Type Nut/Slider Nut/Profile Nut, Turnbuckle/Open Body Turnbuckle/Turnbuckle Tensioner/Adjustable Telescopic Screw/Tension Hook and so on.