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 6220-00-654-7362
NSN 6685-00-227-6750
NSN 5925-01-610-7090
NSN 6145-01-395-9102
NSN 5905-01-505-2163
NSN 6620-01-452-1161
NSN 5998-00-474-1415
NSN 6130-00-104-5573
NSN 6105-01-600-1884
NSN 7035-01-555-3750
NSN 6220-00-111-4051
NSN 6220-01-415-5698