Underwater life support iaw navsea instruction 10560.2b
A nonmetallic circular item with an aperature, having a solid round cross-section. They are used primarily for sealing. For items with other than round cross section, see packing,preformed. For noncircular items with a round cross-section, see seal,nonmetallic round section and rubber,round section.
NSN 6320-01-225-9963
NSN 4140-00-074-4242
NSN 5905-01-529-7320
NSN 5945-01-224-4523
NSN 5998-00-659-9533
NSN 5998-01-470-0692
NSN 5996-01-474-0545
NSN 6105-01-041-8698
NSN 5930-01-506-0788
NSN 5920-01-184-3195
NSN 4140-00-328-1527
NSN 5950-00-882-3248