Fasteners come in a wide variety. According to national standards (GB) and international standards (ISO), common classifications are as follows:
class | explain | Common examples |
bolt | Threading fasteners used in conjunction with nuts | Hex head bolts, high-strength bolts |
nut bolt | Directly screw into the threaded hole of the connected component. | Internal hex screw, self-tapping screw |
nut | Coordinated with bolts for locking | Hexagonal nut, locking nut |
Gasket | Place between the nut or bolt head and the connected component | Flat washer, spring washer, anti-loosening washer |
double-screw bolt | Both ends are threaded for connecting two parts. | Double-ended stud |
rivet | Connect the parts *** through deformation | Solid rivet, core-pulling rivet |
Sell | For positioning or transmitting shear force | Cylindrical pin, Conical pin |
Baffle Ring | For fixing the position of parts on the shaft | Axial elastic retaining ring, hole elastic retaining ring |
In addition, there are other special fasteners such as expansion bolts (used for wall mounting), combination screws, and clamps.
Summary: Selecting the correct type of fastener directly affects connection strength, installation efficiency, and long-term reliability.