Outside diameter is 0.558 inches
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.
Classification: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
NSN 6650-00-211-6302
NSN 6150-00-636-8938
NSN 5835-00-170-5238
NSN 6135-01-190-2628
NSN 6240-01-224-6941
NSN 6620-01-334-7569
NSN 5925-01-161-9564
NSN 6220-01-201-4126
NSN 6110-01-310-8983
NSN 5990-01-395-4194
NSN 6150-00-113-0764
NSN 5965-01-099-2989