Types of Nuts

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Types of Nuts:

There are various kinds of nuts explained below:

1.     Hexagonal Nut
2.     Square Nut
3.     Ring Nut
4.     Cap Nut
5.     Slotted Nut
6.     Cylindrical or Capstan Nut
7.     Dome Nut
8.     Wingnut or Thumb Nut

1.     Hexagonal Nut:

 Hexagonal Nut


This is the most common form of nut used for the general fastening purpose in conjunction with a hexagonal-headed bolt.

2.     Square Nut:

 Square Nut



A square nut is used in conjunction with a square-headed bolt. The spanner used for the nut can have a better hold on a square nut than on hexagonal nut.
3.     Ring Nut:

 Ring Nut


It is the form of a ring provided with slots in the curved surface for a special c-spanner. These nuts are generally used in parts, one nut acting as a lock nut the other.
4.     Cap Nut:

 Cap Nut


It is a hexagonal nut provided with a cylindrical cap at the top to protect the end from corrosion. It also prevents leakage through the threads. Cap nuts commonly used in smoke-boxes locomotives.


5.     Slotted nut: 

 Slotted Nut


Slotted nuts are designed and constructed such that they can form a locking mechanism with a cotter pin or a safety wire.

6.     Cylindrical or Capstan Nut:



This nut is cylindrical in shape and has holes drilled in the curved surface for turning it with a tommy bar.  

7.     Dome Nut:

 Dome Nut


It forms the cap nut having a special dome at the top as shown in the figure.
8.     Wingnut or Thumb Nut:

 Wing or Thumb Nut



A wing nut can be easily operated by the thumb and a finger and is used where it is required to be adjusted frequently.


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