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 5855-01-078-4180
NSN 5950-00-903-2975
NSN 5960-00-816-9040
NSN 7035-01-585-8350
NSN 5905-00-954-2290
NSN 6105-00-765-2043
NSN 5960-00-935-6484
NSN 7035-01-578-6232
NSN 5935-01-449-1791
NSN 6240-00-087-1731
NSN 7035-01-366-5912
NSN 5915-00-932-5324