Air spring _ Xufeng Hardware Factory (certified) _ spring 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 factories and professional butterfly spring, selling products around the world. Purpose: The following spring washer means to prevent the nut nut loose. In the national standards have described. Hexagon slotted screw nut is designed for the end of the bolt holes with the use of special-shaped spring, in order to insert the cotter pin from the nut of the screw holes in the spring slot to prevent automatic return pine nuts, mainly for having the vibration load or alternating load situations. Prevent the mechanical design, fabrication nut (or bolt) automatic back loose methods are: 1. Padded spring washer; (easy to do) with a hex slotted nuts + 2 cotter pin; (an increase of the processing step) 3. . Padded washers; (an increase of the processing step) 4 hexagon head hex bolts inserted steel wire openings. (An increase of machining process) may need to contact me, oh! ! 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 spring wire, modern factories and professional personnel, products sold around the world. Die die springs pools spring applications: Widely used in stamping die die springs, metal casting mold, plastic mold and other elastic motion precision machinery, automobile and other fields. Die spring production standards: the current standardized mold spring production standards: ISO9001: 2000, Japanese JIS, ISO10243, NAAMS (North American automotive metric standard), depending on the standard production standard spring spring today, American Standard spring, ISO10243 Germany standard mold spring. You can contact me, oh! ! !