A cylindrical threaded fastener.
Bolt with washer and then nut threaded onto the bolt.
Coach or Carriage Bolt
A small rounded head with a square section under the head designed to stop the bolt rotating.
A bolt with a built in washer on the head.
Bolt with a plain hexagonal head.
Socket or Caphead Bolt
Fastened with a hexagonal Allen key.
The head of the bolt is designed to locate in the T slots of a bedplate.
A U-shaped, bent iron bar that has bolts and threads at both ends.
Subjects: Fixings and Fasteners