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 6240-01-258-5829
NSN 2925-01-219-9471
NSN 6610-01-062-9994
NSN 5975-01-076-9422
NSN 6220-01-577-7430
NSN 5935-01-452-4104
NSN 5910-01-384-3808
NSN 7035-00-075-6776
NSN 5905-00-410-4253
NSN 5935-01-438-8401
NSN 6645-01-579-2898
NSN 6135-01-167-7604