Understanding the Different Types of Nuts and Bolts – A Complete Guide by Xinchi Fasteners

From furniture and machinery to construction and heavy industry, nuts and bolts are the backbone of reliable fastening. Choosing the right type plays a key role in ensuring strength, safety, and long-term performance.

At Xinchi Fasteners, we recognize the importance of high-quality fasteners to your work. With a production base equipped with over 102 cold heading machines and a daily output exceeding 10 million pieces, we supply a wide variety of durable, precision-made nuts and bolts to meet the demands of different industries. Below is a helpful guide to some of the most commonly used types.

Types of Bolts

1. Hex Bolts

Hex bolts feature a six-sided head and are either fully or partially threaded. They are widely used in construction, automotive, and industrial applications due to their strength and versatility.

2. Carriage Bolts

These carriage bolts have a rounded head and a square neck under the head to prevent spinning during tightening. Carriage bolts are ideal for wooden structures like furniture, decks, and fences.

3. Lag Bolts (Lag Screws)

Designed for wood, lag bolts have a hex head and deep threading for maximum grip. They’re perfect for heavy-duty wood-to-wood connections.

4. Socket Head Cap Screws

These hexagon socket head bolts have a cylindrical head and require an Allen key for tightening. They’re commonly used in machinery and electronics where space is limited.

5. U-Bolts

Shaped like the letter “U”, these bolts are threaded at both ends. They’re used for securing pipes, rods, and tubing to surfaces or other components.

6. Eye Bolts

Featuring a circular loop at one end, eye bolts are often used for lifting or anchoring ropes and cables in heavy machinery or marine applications.

7. Anchor Bolts

These bolts are embedded into concrete to support structural loads. They’re essential for securing heavy equipment and building frameworks.

Types of Nuts

1. T-Nuts (Tee Nuts)

Often used in furniture assembly, T-nuts are hammered into wood and provide a strong internal thread for bolts. Xinchi specializes in Hopper Feed T-Nuts, with a large-scale production capacity to meet bulk order demands.

2. Hex Nuts

The most common nut type, hex nuts are six-sided and used with corresponding bolts for general fastening in construction and machinery.

3. Flange Nuts

These flange nuts include an integrated washer that distributes pressure evenly across the fastening surface, reducing the chance of loosening.

4. Wing Nuts

With two “wings” for easy hand tightening, wing nuts are perfect for temporary fixtures or tool-free installations.

5. Cap Nuts (Acorn Nuts)

These cap nuts feature a closed dome top to cover exposed bolt ends, offering a neat appearance and extra safety.

6. Square Nuts

These square weld nuts are less common but provide a greater surface area for tightening, used in decorative or vintage-style applications.

7. Lock Nuts

Lock nuts are designed to prevent loosening caused by vibration or torque. They come in two main types:

Nylon Insert Lock Nuts: With a nylon ring that grips the bolt.

All-metal Lock Nuts: Use metal deformation to secure the bolt.

Why Choose Xinchi Fasteners?

At Xinchi Fasteners, we combine decades of expertise with cutting-edge manufacturing. Our facilities span over 30,000 square meters, housing two six-story factory buildings. We operate over 102 cold heading machines, delivering consistent quality and massive output—over 10 million pieces daily. Whether you need standard fasteners or customized solutions, we have the capacity and expertise to deliver reliably, on time, and at scale.

XINCHI is a trustworthy fastener company, especially in furniture nuts. We have a factory,  founded in 2007. We are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier, XINCHI offers a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, and washers. If you would like to learn more about fasteners or are interested in wholesale fasteners, please do not hesitate to contact us. Our experienced and expert service team will reply as soon as possible.

Need help selecting the right fastener for your project?

Contact Xinchi Fasteners today and let our expert team assist you with custom solutions and fast delivery.