When should I use a carriage bolt?

Occasions to use a carriage bolt

Definition:

A carriage bolt, also known as a round head bolt, plow bolt or coach bolt, is a fastener designed for a specific fastening task. Its unique design features and usage scenarios make it an ideal choice in a variety of situations.

Here are some of the occasions where carriage bolts should be used:

1. Timber connections: Carriage bolts are most commonly used for connections between timbers, especially when high tightening force and prevention of bolt rotation are required. Its wide domed head prevents the bolt from being pulled too far into the timber, while the square neck underneath it bites the timber tightly to prevent the bolt from loosening or rotating. This feature makes carriage bolts the fastener of choice when building outdoor structures such as wooden decks, fences and posts.

2. Applications that require anti-loosening: Carriage bolts also perform well in applications where it is necessary to ensure that the bolt will not loosen due to vibration or external forces. Its square neck design can embed into the fibers of the wood when tightened, forming a stable bite, which effectively prevents the bolt from loosening.

3. Metal-wood combination structure: Although carriage bolts are mainly used for wood connection, special carriage bolts can also be used in some occasions where metal parts need to be fixed to wood. These special bolts may have different head shapes or neck designs to adapt to the fastening needs of metal parts.

4. Applications that require pre-drilling: Due to the head design of the carriage bolt, it usually requires pre-drilling before installation. Although this step increases the installation time, it ensures that the bolt can be installed correctly and stably in place, avoiding loosening or damage caused by improper installation.

In summary, carriage bolts are widely used in wood connections, applications that need to prevent loosening, and metal-wood combination structures due to their unique design and superior performance. When selecting and using carriage bolts, specific fastening needs and working environment should be considered to ensure the best fastening effect.