The TR2A is a 2-conductor 0.101-inch Micro Jack with PC terminals. It is an extremely small, rugged, shunted Micro-Jax? jack is a standard phone jack. Internally keyed insulators interlock all parts and tip springs grip mating plugs positively. It mates with Switchcraft? Micro-Plug? phone plugs. Jack mount through 0.19-inch diameter hole in chassis/panels up to 0.093-inch thick. For insulated mounting, a 0.281-inch diameter hole and 0.05-inch maximum panel thickness applies. It has nickel-plated copper alloy bushing and hardware, rigid plastic insulating spacers and silver-plated copper alloy tip.