Nut manufacturing process: steel after the punching punching --- processing thread
Nuts according to the different materials, We divided nuts into different kind.Carbon steel, high strength, stainless steel, steel and other major types.
According to the product attributes,there are different standards.Ordinary, non-standard, (old) GB, the new national standard, US system, British system, German standard.
Based on different sizes, different threads,we divided nuts into different specifications. (Such as M8, M16), the United States, the British system with the score or # that specifications (such as 8 #, 10 #, 1/4, 3/8).
Through the inside of the thread, the same specifications of nuts and screws can be connected together. For example, M4-0.7 nut can only be used with M4-0.7 screw (in the nut, M4 refers to the nut diameter of about 4mm, 0.7 refers to two thread teeth The distance between the United States and the same, for example, 1 / 4-20 of the nut can only be with 1 / 4-20 of the screw with (1/4 refers to the nut diameter of about 0.25 inches, 20 fingers per inch There are 20 teeth)
Tag example
Thread size D = M12, performance level 5, without surface treatment, C grade hex nuts:
Nuts GB / T41-2000 M12
Thread size D = M12, performance level of 8, without surface treatment, A-class I-type hexagonal
Nuts GB / T6170-2000 M12