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 6220-01-282-7955
NSN 6685-00-248-5820
NSN 5965-01-317-5020
NSN 6240-00-774-6116
NSN 6685-01-383-4980
NSN 5985-00-713-8568
NSN 5925-01-066-4903
NSN 5855-00-252-5743
NSN 5895-01-130-5150
NSN 5999-01-534-7116
NSN 5985-01-085-4586
NSN 6685-01-508-8251