Abstract: A first embodiment of an aircraft grounding receptacle (10) comprises a connector portion and a tubular portion (18). The connector portion (12) includes an external thread (14) and a hexagonal portion (16). The tubular portion includes a reduced diameter portion (40) and a hexagonal flange (24). Four slots (34) separate the tubular portion (18) into four tines (26,28,30,32) and intersect the flange (24) at locations spaced apart from four of the six points comprising the hexagonal shape of the flange. A bore (38) extends through the body for receiving an aircraft grounding plug (52) and includes reduced diameter portions (40,41) for mating engagement with the terminal groove (54) of the plug.A second embodiment of the aircraft grounding receptacle (60) comprises a plug receiving portion (62) and a collet portion (64).