Mild steel carriage bolts and nuts are another type of fastener commonly used in construction, woodworking, and other applications where a smooth, finished appearance on one side of the joint is desired. Carriage bolts, also known as coach bolts or round head square neck bolts, have a domed head with a square section underneath, which prevents the bolt from turning when the nut is tightened. This design makes carriage bolts ideal for applications where access to both ends of the bolt is limited or where a decorative finish is desired.

The head of a carriage bolt typically has a shallow dome shape and is smooth on top, giving it a finished appearance. The square section underneath the head is designed to fit into a square hole in the material being fastened, preventing the bolt from turning when the nut is tightened. This feature eliminates the need for a wrench to hold the bolt in place while tightening the nut, making carriage bolts easy to install.

Mild steel carriage bolts are made from low carbon steel, which provides good strength and durability for a wide range of applications. They are available in various lengths, diameters, and thread sizes to suit different needs. The accompanying nuts for carriage bolts are typically standard hex nuts, which are used to secure the bolt in place.

Like other fasteners, proper selection and installation of mild steel carriage bolts and nuts are essential to ensure a secure and reliable connection. Factors to consider include the size and length of the bolt, the material and thickness of the components being fastened, and the load-bearing requirements of the application. Additionally, proper tightening torque should be applied to ensure that the joint is adequately secured without damaging the fasteners or the materials being joined.

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