A fuse includes a first connection portion, a second connection portion, and a fixing portion connected to the leading end of the second connection portion. The fixing portion includes a fixing hole passing therethrough along a fixing axis extending in a first direction. The fixing portion has a plurality of fixing pieces arranged side by side in a circumferential direction centered on the fixing axis. Each fixing piece is formed in an arc shape centered on the fixing axis. The fixing portion has a level difference at each predetermined angle in the circumferential direction due to the plurality of fixing pieces being arranged so as to be shifted with respect to each other in the first direction, and is formed into an open annular shape that has a first annular end and a second annular end are spaced apart from each other at a predetermined interval.

A fuse cutout assembly cover including an insulator cover end for positioning over a cutout assembly insulator and including a shield end for shielding a cutout upper contact assembly. The insulator cover is constructed to receive a variety of insulator and cutout assembly configurations.