Aka hippo
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 2925-01-345-4816
NSN 6620-00-251-0569
NSN 4140-00-078-9357
NSN 5965-01-399-8454
NSN 7035-01-501-9118
NSN 6150-01-425-1311
NSN 5935-00-155-4662
NSN 5905-01-132-4126
NSN 6650-01-244-9847
NSN 6620-00-170-5296
NSN 6610-01-060-7626
NSN 5950-01-278-8205