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5/16 carriage bolts are a specific size of carriage bolts commonly used in construction and engineering applications. These bolts feature a smooth, rounded head and a square neck beneath the head, providing secure fastening without the need for a wrench on the head side. The 5/16 size designation refers to the diameter of the bolt shank. These bolts are often used in applications where a balance between strength and size is required, such as in furniture assembly, framing, and general construction.

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what is a screw used for