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 5905-01-386-1108
NSN 5905-01-557-5395
NSN 5945-00-597-5722
NSN 5945-00-577-1756
NSN 7035-01-029-7221
NSN 6145-00-199-0235
NSN 5965-01-082-6800
NSN 5905-01-403-2806
NSN 6320-01-631-7828
NSN 5855-01-513-9601
NSN 6105-01-263-2248
NSN 5950-01-381-3959