The sealing member or stopper, which may or may not be spherical, used in a drain, automatic, boat.
NSN 5998-01-167-2709
NSN 7035-01-622-4817
NSN 7035-01-033-3007
NSN 6130-01-254-3934
NSN 5895-01-225-8658
NSN 5990-01-473-4314
NSN 5835-01-463-2334
NSN 6105-01-349-3317
NSN 6135-00-209-6918
NSN 5999-01-515-9578
NSN 5999-00-823-3262
NSN 5985-00-521-4292