The sealing member or stopper, which may or may not be spherical, used in a drain, automatic, boat.
NSN 5975-00-254-7217
NSN 5935-00-119-9061
NSN 6110-01-622-2923
NSN 6145-01-247-9818
NSN 4140-01-470-1359
NSN 5990-01-421-3325
NSN 5925-00-831-8882
NSN 6685-01-569-0310
NSN 6650-01-624-8135
NSN 6110-01-129-2520
NSN 5855-00-631-4565
NSN 5930-00-687-1462