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 6620-01-396-2149
NSN 5965-01-200-6613
NSN 5855-01-199-2046
NSN 5999-01-386-4454
NSN 6150-00-424-9201
NSN 5996-00-100-4932
NSN 4140-01-541-9421
NSN 5985-01-258-3226
NSN 5990-00-985-1334
NSN 6610-00-183-0664
NSN 5985-01-128-0717
NSN 5950-01-392-0524