Reference parts book 0532-lp-103-0916, section 6, figure 6.44, item 20
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 6650-01-423-1348
NSN 6650-01-127-9518
NSN 6220-00-113-3622
NSN 6685-01-471-8192
NSN 5935-01-591-2283
NSN 6135-01-061-1862
NSN 5925-00-429-9586
NSN 6610-01-499-8788
NSN 6150-01-360-5880
NSN 6610-01-329-8017
NSN 6610-00-827-8959
NSN 5920-01-601-9806