Type Of Bolt Heads
The most common type of bolt head types includes square, hex, slotted hex washer, and socket cap.
The earliest bolt heads in use were the square heads. Square heads consist of a square indentation on the head followed by a shaft that withstands rotation when a torque is applied to it.
Square heads are still in use today but hex heads have become more common. Hexagonal heads are used with a wrench or a spanner to provide torque.
There are numerous other head shapes in use as well, namely:
- Flat bolt head: A counter shank head with a flat top.
- Oval bolt head: A counter shank head with rounded head top.
- Pan bolt head: A slightly rounded head with a short vertical side.
- Truss bolt head: An extra-wide head with a rounded top.
- Round bolt head: A Dome’s head.
- Hex bolt head: A hexagonal head.
- Hex washer bolt head: A Hexagonal head with a round washer at the bottom.
- Slotted hex washer bolt head: A hexagonal head with a built-in washer and slot.
- Socket cap bolt head: A small cylindrical head using a socket driver.
- Button bolt head: A low-profile rounded head with a socket driver.
However, there are many similarities between bolts and screws, there are some differences too.