Carriage Bolts Overview

Carriage bolts, also known as round head square neck bolts, have round heads and square necks. This design allows the square neck to fit into the hole of the connected part during installation, preventing the bolt from rotating during tightening. They are commonly used in wood structures, metal connections, and heavy machinery, and are suitable for outdoor and humid environments.

Application of Carriage Bolts

1. Wood connection: Mainly used in wood structures, such as furniture, wooden frames and fences, because the square neck can be embedded in the wood to prevent rotation, it is easy to install.
2. Metal structures: Used to fix metal parts to wood, such as in trucks, trailers, boats, etc. where a stable connection is required, and often used in earthquake-resistant structures.
3. Outdoor environment: Suitable for outdoor wooden structures, such as pavilions, decks and piers. Galvanized or stainless steel-treated carriage bolts can resist corrosion and be suitable for humid environments.
4. Heavy equipment: Widely used in construction, mining and mechanical equipment to connect parts that are subject to greater pressure.

Features of Carriage Bolts

Advantages:

1. Prevent rotation: The square neck can prevent the bolt from rotating after being embedded in the material, making the installation more stable.
2. Beautiful: The head is sleek and the appearance is simple, suitable for exposed structures.
3. Strong durability: Stainless steel or galvanized materials are corrosion-resistant and suitable for outdoor and humid environments.
4. Easy installation: No special tools are required for installation, suitable for quick assembly.

Disadvantages:

1. Load limitation: Not as stable as other types of bolts under high loads, more suitable for medium and low load connections.
2. Need to match specific holes: The square neck needs to be embedded in a square or specific size hole, otherwise the installation effect will not be good.
3. Loosening risk: It may loosen under vibration or high stress environment, and requires regular inspection and maintenance.