Requirements for Clinch Nut Fasteners in the Automotive Industry

Car manufacturers have increasing demand for car riveting accessories and fasteners, along with the product structure being greatly changed, the quality requirements also have become very harsh, fasteners are required of high strength, high precision, union-typed, unique shaped and highly reliable. The rod fasteners having the strength grade of 8.8-12.9 level and various riveting nut fasteners with strength grades in the 8-12 level were accounted for more than 80% in car manufacturing. The quality and reliability requirements of standard fasteners are still very strict.

In addition to the automobile engine and other key parts make use of 10.9 level and above clinch nut fasteners, the rest parts mainly use 8.8-class fasteners. The fastener materials include low carbon steel wire and stainless steel wire. Most of these fasteners are applied in welding parts and decorative parts, more than 80% are high-strength fasteners, of which 10.9 level and above accounted for 50%. The common standard parts in these fasteners are available in the market. 10.9 level and above fasteners, or some union-typed, welding special shaped fasteners, due to high quality and specialization requirements, are produced by the designated professional factory.

The high-end car engine uses imported car riveting accessories and clinch nut fasteners, or fasteners made by foreign original professional fasteners manufacturers in the domestic production. In addition to some of the products of intellectual property rights are in foreign, China's fastener products and the wire materials exist problems in quality stability. The fasteners for cars mostly made through cold forming process, which is generally the same principle of the manufacture of ordinary fasteners, but in a higher quality requirement and stricter in the control of defect.