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 5895-00-141-9127
NSN 6320-01-352-8084
NSN 5905-01-502-2048
NSN 6620-01-560-4497
NSN 4140-01-399-4352
NSN 5910-00-188-9624
NSN 6220-00-830-4692
NSN 6110-01-381-1269
NSN 5930-01-189-8537
NSN 4140-01-495-3696
NSN 5999-00-212-7853
NSN 5950-01-039-9797