Drum bolts and lugs are essential components for bolt type drum lock rings. Lugs are welded onto drum rings and drum bolts go across the lugs and close up the drum ring by tightening the nuts. This system is able to provide a strong sealing solution for the open head drum.
Unlike drum clamps, a wrench is necessary when dealing with drum bolt and lugs. Nuts on drum bolt need to be tightened up to provide enough closing power for the entire drum ring. Material mechanical strength of drum bolts and lugs directly determines the safety level of the closing system.