bayonet pin
small piece of metal which projects from the shell of a cap, particularly a bayonet cap, and which engages in a slot in a lampholder to fix the cap
Note 1 to entry: This entry was numbered 845-08-21 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-83 in CIE S 017:2011.