T-1 (3mm) Subminiature Incandescent LampsT-1 lamps have a nominal diameter of 0.118 inches (3,0 mm) Subminiature Lamps T-1 Wire Terminal T-1 Helium Retardant T-1 Bi-Pin .050 CtoC T-1 Bi-Pin .100 CtoC T-1 Integral Bi-Pin T-1 Midget Flange T-1 Short .130 MOL T-1 Short .145 MOL