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 6620-01-255-7757
NSN 6130-01-323-6416
NSN
NSN 5990-01-016-1212
NSN 6645-01-391-9820
NSN 5855-00-058-1293
NSN 6105-00-974-4298
NSN 5960-01-219-5504
NSN 5975-01-149-8889
NSN 6320-01-473-3848
NSN 5925-00-229-8024
NSN 5975-01-156-8968