The standard of welding nuts has four kinds: GB(GB/T), German standard (DIN), British standard (BS), Japanese standard (JB). Welding nut is a nut suitable for welding outside the nut, generally made of weldable materials and thicker suitable for welding, welding is equivalent to two separate parts into a whole, with high temperature melting metal mixed together and then cooling, the middle will be added to the alloy, the internal is the role of molecular force, the strength is generally greater than the parent strength. The experiment of welding parameters depends on the fusion size of the weld, and the welding parameters are adjusted according to the fusion size until the defects are eliminated. Of course, the quality of welding is related to pre-welding treatment, cleaning ash, oil stains and so on. Welded nuts are common products, are used in many industries, and there are many suppliers of manufacturing their products on the China Standard Parts network, the price is also different because of the process and other reasons, so at the time of purchase can not be chosen because the price is cheap or expensive, but should be a number of contacts to investigate and ask, so as to choose the right product.