06/16/2025
📌 9 Common Types of Nuts Used in Engineering (With Simple Examples)
By Akwa Mechanic
Nuts are essential fasteners used with bolts to securely join parts together. Here are 9 commonly used types in engineering and construction:
1. Fl**ge Nut
Features a built-in washer base that spreads load evenly and prevents loosening. Ideal for fast, secure assemblies.
2. Hexagonal Nut (Hex Nut)
The most widely used nut with six sides for easy tool grip. Found in nearly all machinery and construction work.
3. Knurled Nut
Has a textured surface for easy hand tightening. Best for electronics and lightweight applications.
4. Wing Nut
Equipped with two “wings” for turning by hand. Perfect for tools or setups that need frequent adjustments.
5. Square Nut
Four-sided design offers more contact area. Common in vintage machinery and wooden joints but needs specific tools.
6. Thumb Nut
Round nut with ridged edges made for hand-tightening. Used in tripods, appliances, and access panels.
7. Ring Nut
A circular nut tightened with special tools. Used on shafts and spindles in mechanical systems.
8. Capstan Nut
Cylindrical with side holes for bar or pin tightening. Ideal for marine, industrial, and heavy-duty use.
9. Cap Nut (Acorn Nut)
Encloses the bolt end to prevent rust and injury. Provides a neat finish in bikes, furniture, and outdoor fittings.