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The retaining bolt with nut is a fastening hardware item used to secure components within boilers and burners. This bolt and nut set is designed to withstand the thermal and mechanical stresses of heating equipment, providing a tight and durable connection. Whether you are mounting a burner flange, securing a heat exchanger, or attaching other parts, this retaining bolt ensures that everything stays firmly in place. When replacing lost or damaged hardware, using the correct bolt and nut is critical for safety and performance. This set is a common requirement during maintenance and repair tasks.