The CARRIAGE BOLT UNC ZINC 1/4"-20 X 1-1/2" GR A is made from low to medium carbon steel, ensuring strength and durability. Featuring a round head and a square neck under the head, this bolt is engineered to prevent rotation during tightening, making it ideal for secure connections in various applications. With a tensile strength of 60, it is suitable for use in construction, machinery, and automotive projects. The zinc plating provides corrosion resistance, enhancing its longevity and performance in outdoor environments.