A plow bolt is a heavy-duty bolt used in the construction, agricultural, and mining industries for attaching cutting edges to heavy machinery, such as plows, bulldozers, and excavators. They are designed to withstand extreme loads and stresses and are often made of high-strength steel alloys. Plow bolts typically have a square or hexagonal head that is countersunk into the material being fastened, which helps prevent shearing and twisting. Additionally, a flat, tapered or domed head allows it to be flush with the surface of the material being fastened. They are usually installed with a nut or a lock washer that helps to prevent loosening under vibration or heavy use.