Laser welding is the method of choice in this industry as it allows for the welding of small nuts with high precision and minimal damage to the surrounding components. Nut welding in electronics ensures secure connections for mounting components and providing electrical grounding. 1 of BS EN 1090-2 specifies that bolts and nuts shall not be welded, unless otherwise specified, however it is dificult to think of circumstances nd alloy steel are given in BS EN ISO 898-1. Annex B of the standard explains that elevated. There are a number of different types of weld-nut available commercially; some are covered by national standards such as British Standard BS 7670 'Steel nuts and bolts for resistance welding' (DIN equivalents). The nuts are welded to the sheet metal at the contact points of the weld nut – this process is also known as projection welding. This is also an advantage when the welding. The welding and bolt connection of the distribution box made by the distribution box manufacturer shall be firm, and the welding seam shall be uniform and smooth, without welding skin, welding penetration, air hole and other adverse phenomena; The bolt connection shall have flat and spring washer. In the manufacturing process of metal distribution boxes, welding constitutes a critical stage following sheet metal cutting and bending. Although weld nuts can be installed using a variety of equipment, spot welder, fasteners and electrodes must be clean.