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 5920-01-652-2866
NSN 6130-00-186-0737
NSN 6650-01-249-3201
NSN 5835-00-740-0246
NSN 2925-01-521-0600
NSN 5998-00-079-0591
NSN 7035-01-653-5450
NSN 6145-00-984-4139
NSN 5960-01-506-7039
NSN 5925-01-313-7188
NSN 5915-01-389-8302
NSN 5935-01-087-6495