1) Hex Bolt
Bolt With a hexagonal head and threaded body. Section immediately under head may or may not be threaded.
2) Socket Cap Screw
Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key).
3) Set Screw
Set screws have no head and machine threads for use in a tapped hole. Allen (hex socket) drive is a six-sided recess for use with an Allen wrench (hex key).
4) CSK Socket Screw
Flat heads are countersunk (cone shaped under the head) with a flat top. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key).
5) Carriage Bolt
Bolt with a smooth rounded head and a square section to prevent turning followed with a threaded section for a nut.

Circlips

Circlips simplify designs and linked with lower installation costs are the ideal item for replacing more traditional fasteners. Manufactured from carbon steel with a phosphate finish.
External circlips fit around a shaft, pressing on it, while internal circlips are fitted inside a cylindrical bore, or housing, and push outwards.