1, the nut is the nut, and bolts or screws screwed together to play a role in fastening parts, all manufacturing machinery must be used in the production of a component according to the different materials, is divided into carbon steel, stainless steel, non-ferrous metals (such as copper) and other major types. According to the attributes of the main national standard (GB), German standard (DIN), international standards (ISO), Japanese standard (JIS), American standard (ASTM/ANSI) and other standards. Among them, the national standard, German standard, Japanese standard with M (for example, M8, M16), the American system, the British system with a fraction or # indicate specifications (such as 8 #, 10 #, 1/4, 3/8).
2, the nut is the mechanical equipment closely connected parts, through the inner threads, the same specification nuts and bolts can be connected together, for example, M4-P0.7 nuts can only be connected with M4-P0.7 series of bolts (in the nut, M4 refers to the inner diameter of the nut of about 4mm, 0.7 refers to the distance between the two threaded teeth of 0.7mm); the American system products are also Similarly, for example, a 1/4-20 nut can only be paired with a 1/4-20 screw (1/4 refers to a nut ID of approximately 0.25 inches, and 20 means that in each inch, there are 20 teeth).
Main types
Stainless steel
Self-locking nuts, anti-loosening nuts, locking nuts, four-jaw nuts, screw-in nuts insurance nuts, thin rod screw connection nuts self-locking hexagonal cap nuts special ground screws with nuts, hexagonal coronal thin nuts eyebolt nuts.
Fine Thread All-Metal Hexagon Flange Face Locking NutAll-Metal Hexagon Flange Face Locking NutFine Thread Non-Metal Insert Hexagon Flange Face Locking NutFine Thread Hexagon Flange Face Nut