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 6645-01-463-4314
NSN 6320-00-564-2772
NSN 5905-01-005-0425
NSN 7035-01-077-6041
NSN 6685-01-377-4716
NSN 6685-00-361-9797
NSN 6135-00-284-1406
NSN 5950-00-415-4569
NSN 6135-01-132-6310
NSN 6685-01-361-9258
NSN 5915-01-467-2578
NSN 2925-01-364-7926