Provides protection from flooding through the real seal; ceramic
NSN 5998-01-159-5705
NSN 5999-01-474-7011
NSN 5990-00-184-5750
NSN 6240-01-030-7071
NSN 5998-01-202-4233
NSN 5855-00-869-3635
NSN 6130-01-023-8031
NSN 6135-00-369-2368
NSN 5895-01-499-3218
NSN 5835-00-092-1136
NSN 5895-00-262-4331
NSN 6240-01-114-1926