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 6610-01-633-8931
NSN 5960-00-597-2680
NSN 5915-00-594-7786
NSN 5960-01-119-1288
NSN 6150-01-068-8991
NSN 5935-01-403-2844
NSN 6135-01-437-6409
NSN 6145-01-026-0030
NSN 5835-00-466-8544
NSN 5999-00-051-1324
NSN 5895-00-321-0273
NSN 5910-01-310-8935