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 6650-01-399-8552
NSN 5960-00-367-3735
NSN 5835-00-905-7165
NSN 6145-01-546-3379
NSN 5835-00-411-6344
NSN 5920-01-330-5224
NSN 5965-00-976-9465
NSN 6620-01-068-4498
NSN 5910-01-277-9909
NSN 5950-01-067-7948
NSN 5855-01-290-3248
NSN 5985-00-827-1061