US Patent 9915366 Threaded adapter assembly and fuse plug

A plug system is provided. The plug system may comprise an adapter having an annular body oriented about an axis, a passage defined by the annular body, and a retention feature protruding radially from the annular body. The retention feature may be configured to obstruct the passage. A threaded surface may at least partially define an outer diameter of the annular body. A fuse plug may be configured for insertion into the passage, and the retention feature may be configured to at least partially retain the fuse plug.