As differentiated by material which must conform to ships control center special quality control provisions
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 5895-01-596-2659
NSN 6135-01-443-5279
NSN 5996-01-541-5453
NSN 5950-01-474-3920
NSN 5998-01-360-8872
NSN 5920-01-534-7866
NSN 5990-01-395-4194
NSN 5905-01-145-0413
NSN 5915-00-785-6428
NSN 6620-01-128-3053
NSN 5855-00-631-4565
NSN 6620-00-270-3275