Od is 0.375 in
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 5910-00-177-8291
NSN 6110-00-113-1415
NSN 5990-01-442-3520
NSN 5910-01-542-8835
NSN 5999-01-036-6991
NSN 6220-00-200-7888
NSN 5950-01-077-2397
NSN 2925-01-376-9236
NSN 5965-01-364-1232
NSN 6150-01-199-0489
NSN 6240-01-545-4554
NSN 6610-00-832-3137