The sealing member or stopper, which may or may not be spherical, used in a drain, automatic, boat.
NSN 5910-00-021-8334
NSN 6220-00-577-3435
NSN 6645-01-633-1852
NSN 5960-00-258-9292
NSN 6130-01-477-5571
NSN 5895-00-146-1809
NSN 6105-00-801-9874
NSN 6220-00-238-0433
NSN 6685-01-501-1390
NSN 6650-00-494-1000
NSN 5925-01-519-9251
NSN 5985-01-169-5410