What Are Castle Nut

What is Castle Nut? Uses, Dimensions and Properties

ByRachana Singh

Castle nuts are an essential component in many mechanical applications. They are used in various industries and can be found in everything from automotive engines to household appliances. If you want to learn more about castle nuts and their uses, you’ve come to the right place! Let’sLet’s take a look at castle nuts and why they are so important.

What is Castle Nut?

Castle nuts, also known as slotted nuts or cotter nuts, are metal fasteners with slots on one side. This slot allows for a cotter pin or wire to be inserted, which helps keep the nut from coming loose. These slots give the nut its distinctive “castle” shape, hence the name. Castle nuts can be used on any screw-type fastener and provide an extra layer of security against loosening over time due to vibration or other forces.

Where is Castle Nut Used?

Castle nuts are used in a wide variety of industries for both commercial and residential applications. In the automotive industry, castle nuts are used to secure components such as spark plug wires, alternators, starters, and drive shafts. They can also be found in machineries such as tractors and snow plows, which help hold parts together securely while providing easy access for maintenance when needed. In your home, castle nuts can be found on almost any appliance with moving parts, such as refrigerators, washing machines, stoves, air conditioners, etc.

Why Use Castle Nut?

As mentioned previously, one of the main benefits of using castle nuts is that they provide an added level of security against loosening caused by vibration or other forces. Additionally, they require little time or effort to install compared to other fasteners like bolts which must first have holes drilled into them before installation. Furthermore, castle nuts are extremely durable and long-lasting since they do not corrode easily like other metal fasteners. Finally, because castle nuts feature slots rather than threads, they provide an even distribution of pressure, further enhancing their durability over time.

Castle Nut Properties

  • Castle nuts, also known as slotted nuts, are a type of nut with a slot cut into the side of the nut.
  • Castle nuts are typically used in applications where it is important to prevent the nut from coming loose, such as in aircraft and automotive applications.
  • Castle nuts are typically made from steel or brass.
  • The slot in the castle nut is designed to align with a cotter pin, which prevents the nut from coming loose.
  • Castle nuts are available in various sizes, depending on the application.

Castle Nut Dimensions

Metric Technical Data
Thread Diameter S (mm) E (mm) M max. (mm) W max. (mm) N min. (mm)
M4 7 7.74 5 3.2 1.2
M5 8 8.87 6 4 1.4
M6 10 11.05 7.5 5 2
M7  11 12.12 8 5.5 2
M8 13 14.38 9.5 6.5 2.5
M10 17 18.9 12 8 2.8
M12 19 21.1 15 10 3.5
M14 22 24.49 16 11 3.5
M16 24 26.75 19 13 4.5
M18 27 29.56 21 15 4.5
M20 30 32.95 22 16 4.5
M22 32 35.03 26 18 5.5
M24 36 39.55 27 19 5.5
M27 41 45.2 30 22 5.5
M30 46 50.85 33 24 7
M33 50 55.37 35 26 7
M36 55 60.79 38 29 7
M39 60 66.44 40 31 7
M42 65 71.3 46 34 9
M45 70 78.26 48 36 9
M48 75 82.6 50 38 9
M52 80 88.25 54 42 9
M56 85 95.07 57 45 9
M58 90 100.72 63 48 11
M60 90 100.72 63 48 11
M64 95 106.37 66 51 11
M68 100 112.02 69 54 11
M72 105 117.67 73 58 11
M76 110 123.32 76 61 11
M80 115 128.97 79 64 11
M85 120 134.62 88 68 14
M90 130 145.77 92 72 14
M95 135 151.42 96 76 14
M100 145 162.72 100 80 14

Conclusion:

Castle nuts are an essential component for many mechanical applications across multiple industries. Their unique “castle” shape provides extra security against loosening due to vibration or other forces while being extremely durable and long-lasting over time due to their corrosion-resistant properties. Whether it’s an automotive engine part or something as simple as a washing machine at home, you can rest assured knowing that your application is held together securely with a castle nut!

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