The Collaborative International Dictionary of English v.0.48:
Fuse plug \Fuse plug\, or Fuze plug \Fuze plug\ . 1. (Ordnance) A plug fitted to the fuse hole of a shell to hold the fuse. [Webster 1913 Suppl.] 2. A fusible plug that screws into a receptacle, used as a fuse in electric wiring. [Webster 1913 Suppl.]