Nuts are our common fastener products. They are used with bolts, studs or other threaded workpieces for attachment and fixing. In general, the strength of the bolts selected in the design is higher than the strength of the corresponding Roofing Bolts to ensure that the life of the bolts is longer than the life of the nuts when used together. When the fastener is removed and replaced in this manner, the cost of replacing the nut will be less expensive and more convenient.
Currently, many power generation equipment and vehicles such as airplanes, automobiles, trains and ships are rapidly developing. Therefore, our roof bolts and other locking parts need to adapt to the rapid development trend in order to achieve greater development. High-strength bolts are mainly used to connect some important mechanical equipment, especially for repeated disassembly and assembly. Various assembly methods require very high nuts. Threads are also important, and the surface quality and precision of the threads directly affect the safety factor of the equipment used.
In general, in order to adjust the coefficient of friction during use to prevent rust and clogging, it is usually necessary to coat the surface with nickel and phosphorus. The thickness of the coating is generally controlled within the range of 0.02-0.03 mm, and the coating should be uniform, compact, and free of pinholes.
The Ni-P coating process for Round Head Bolt consists of three parts: first, pre-treatment, including pre-plating accuracy and visual inspection to see if there are cracks or defects before plating, manual removal of grease or pickling. The second is to electroplate the activation nut and quickly plate nickel and then perform electroless nickel plating. In the nickel treatment process, a series of chemical methods are used to deposit nickel on the nut, and the final step is post treatment. Post-treatment typically includes hydrogen-driven heat treatment, polishing and finished product inspection.