Fasteners come in many different forms. Bolts are those fasteners that require a nut or a pre-tapped hole to be installed. Screws are deemed to use their threads to deliver their holding power. To make it easy for you in clearing the confusion, read on for the types of nuts and bolts below.
Types of Nuts
- Cap nuts
The cap nut is also known by the name, acorn nut. It is inevitable to get its name from its shape. It has a domed top to avoid contact with the external thread.
- Castle nuts
Castle nuts are used with the cotter pins to avoid loosening. A castellated nut which is also called a castle or a slotted nut. It is not cut with a slot on its top. Castle nuts are used in low-torque applications like holding a wheel bearing in place.
- Coupling nuts
A coupling but is a threaded fastener which is used for connecting two male threads, most often the threaded rod. The external part of the fastener is a hex, so it has to be driven with a wrench.
- Flange serrated nuts
A flange nut is a type of nut that has a wide flange at one end that acts like an integrated washer that doesn’t spin or move. The serrated flange disperses the pressure of the nut over the part of the nut being secured and creates a locking action to avoid loosening.
Types of Bolts
- Carriage bolts
Carriage bolts are also known as coach bolts. It has a domed or countersunk head. The square section under the head grips into the fastened part avoids the bolt from turning when the nut is subjected to tightening.
- Hex head bolts
Four types of bolts fall under this category: hex tap bolts, hex cap screws, trim head hex cap screws, and hex serrated flange bolts. They have a hexagonal head and are driven with a wrench.
- Machine screws
A machine screw or bolt is a bolt that comes with a flat point. It is available in various types and heads, and they are fit for a wide variety of applications. They are often driven into tapped holes. It is also called as stove bolts or stovers. They are also used with nuts and washers.
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