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 6645-00-527-7258
NSN 5960-01-142-5399
NSN 5905-01-260-9466
NSN 5835-00-816-0394
NSN 5925-01-382-9313
NSN 5950-00-361-8880
NSN 5895-00-957-4532
NSN 6240-00-329-9573
NSN 6610-01-504-3658
NSN 5950-00-242-6893
NSN 5975-01-093-8764
NSN 6685-01-390-0412