Supply of high-strength nuts, fasteners Yongnian County Bowen specializes in processing high-strength nuts, we have advanced technology, excellent equipment, high-tech assembly line 12 nut specifications, is a professional supplier of high-strength nuts, reasonably priced high-strength Yongnian nuts, complete specifications, allowing you to buy the rest assured useful products. Also known as blue black nut, the workpiece in a solution of air, steam or chemical substances at room temperature or heated to a suitable temperature, is formed in the surface layer of blue or black oxide film 35Crmo nut, in order to improve the corrosion resistance and the appearance of the surface treatment process. Basic black standard alkaline based. Supply of high-strength nuts, fasteners Yongnian County Bowen specializes in processing high-strength nuts, we have advanced technology, excellent equipment, high-tech assembly line, is a professional supplier of high-strength nuts, reasonable price, complete specifications, allowing you to buy the rest assured useful products. To choose a good product before use, to meet the connectivity needs. The average consumer will choose the appropriate length of the screw to tighten exposed after one or two teeth from optimal. In addition, also carefully check the thread status. High-strength nuts, Yongnian local production of large manufacturers | Bowen (certified), the nut is provided by Yongnian County Bowen fasteners. Yongnian County Bowen fasteners (www.bwjgj.com) is Handan, fasteners leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Bowen fasteners leadership with the staff warmly welcome all inquiries negotiations to create Bowen fasteners a better future.