Mechanical Parts

Fasteners:

Bolts - A bolt is a critical mechanical fastener consisting of two primary components: a head and a threaded shaft (cylindrical body with external helical ridges). This versatile fastener is designed to securely join two or more components, often in conjunction with a nut.

Nuts - A nut is a mechanical fastener with a threaded hole. It is attached to a bolt, screw or stud to provide a clamping force and prevent axial movement.

Screws - A screw is a broad category of mechanical fastener with a threaded shaft, designed to screw into a part. This includes wood screws and self-topping screws, which have a tapered shaft with sharp threads designed to cut a mating thread in the part to which they are fastened. It also includes machine screws, which much more closely resemble bolts, but their entire shaft is normally threaded.
Difference between bolts and screws: Bolts and screws are sometimes delineated by their use. According to these definitions, a bolt passes through unthreaded holes in parts and is secured by a nut while a screw mates with a threaded hole in one of the parts being fastened. In practice this definition is not strictly applied. The term bolt is usually used for a fastener which is not self-tapping and has only part of its shaft threaded. Fasteners which are either self-tapping or which have their entire shaft threaded are normally called screws.

Washers - Washers are disks of metal or non-metallic material placed beneath a nut, an axle bearing, or a joint, to relieve friction, prevent leakage, isolate, prevent loosening, or distribute pressure.

Rivets - Rivets are specific, headed, usually non-threaded fasteners that are beaten or pressed into place to secure two or more items together. Rivets are cylindrical mechanical fasteners capped with a flanged or forged head on one end. Rivets have different shaped heads, including domed, flat, or countersunk.

Pins - Pins are used to fasten the shaft-supported elements to the shaft where they will prevent the axial movement, that might result from thrust load, and at the same time enable the transmission of torque. The simplest type of pins is the Straight pin which has a circular-cross section and it is specified by its diameter and length.

Clips - These distinctive machined clips are used to hold cylindrical objects such as tools in place via spring tension. They can also be used to connect and attach moving parts in engines and other mechanical equipment.