Die springs, Xufeng Hardware Factory (certified), the spring is provided by Dongguan City, Xu-feng Hardware Products Factory. Dongguan City, Xu-feng Hardware Products Factory (www.dglijing168.com) is specialized in the "spring-like, lathe category, stamping class, spring, torsion spring, retainer, battery spring, shaped bomb" of the enterprise, the company receives "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Miss Liu. Dongguan City, Xu-feng Hardware Products Factory is a professional manufacturer of metal springs, lathe parts and stamping parts of the enterprise, the factory has advanced technology and equipment, modern workshops and professional personnel, products sold around the world. Widely used in wire and cable, textiles, waterproof material, non-woven, seat belts, rubber, plastics, films, wire rope, steel, wire, foil, sheet metal and metal rods wire and other metal materials and non-metallic materials and zero Parts of products for tension, compression, bending, tearing, 90 ° peel, 180 ° peel, shear, adhesion, pull-out strength, elongation test, and special mechanical properties such as elongation test some products. The same spring, a spring is a tension spring, a spring toys spring, spring applied five kilograms of weight reduction in the length of 10 mm, if the tension spring will also stretch 10 mm it! ! Dongguan City, Xu-feng Hardware Products Factory is a professional manufacturer of metal springs, lathe parts and stamping parts of the enterprise, the factory has advanced technology and equipment, modern workshops and professional personnel, products sold around the world. English name for the disc spring washers Heavy Duty Bolting Washers, or call DISC WASHER; the difference between ordinary disc springs for the bolts connecting bolt connection strength of 8.8 and above; common mechanical surface treatment galvanized (Rui Yi Metal production machinery white zinc, yellow zinc); there dacromet, phosphate and some other way; in fact, the most common foreign, the most common is the mechanical galvanized, strong corrosion resistance because the first mechanical galvanizing, and no hydrogen embrittlement of the elastic member 6796 such better; and Dacromet coating thickness due to insufficient surface tension spring in the installation and subsequent use, corrosion resistance far less than the nominal 800 hours, 1000 hours and other conventional about 3 years to 5 years would rust; and in the German-owned enterprises such as regular shaped springs, ABB, SIEMENS and other companies, mechanical galvanized surface protection necessary for DIN6796 way;! !