This clamp secures components to the threshing drum of a combine harvester or self-propelled forage harvester. It holds the rasp bars or other wear elements in position against the drum surface during rotation. A loose or missing clamp allows the secured component to shift, which causes imbalance and accelerated wear on the drum assembly. The 4 mm hole diameter matches the original mounting studs, so the clamp seats without modification. On reinstallation, confirm that the clamp is fully seated and the fastener is torqued to the specification for the host machine.