Screws, usually used alone (sometimes with washers), generally to fasten or tighten the role, should be screwed into the internal threads of the body

Bolts  Machine parts, cylindrical threaded fasteners with nuts. A class of fasteners consisting of two parts: a head and a thread (a cylinder with external thread), to be fitted with a nut, for fastening the connection of two parts with a through-hole

Nuts, The nut connects the bolt or screw together to play a fastening role in the parts.

Wood screws, used for screwing into the wood for joining or fastening purposes

Self-tapping screws, the working screw holes that match the self-tapping screws do not need to be tapped in advance, and the internal threads are formed while screwing in the self-tapping screws.

Studs, A type of fastener without a head and with external threads on both ends only

Retaining Ring is mainly used to position, lock, or stop the part on the shaft or in the hole.

Washers, the part that is padded between the connected parts and the nut. Generally, flat-shaped metal ring used to protect the surface of the connected parts from nut abrasion, disperse the pressure of the nut on the connected parts

Rivet has a head and the rod is not threaded. When used, the rod is inserted into the hole of the connected part, and then the end of the rod is riveted tightly to play a connecting or fastening role.

Pin, usually used for positioning, also for connecting or locking parts, and as overload shearing elements in safety devices