Material is type 1, class 1
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.
NSN 5990-00-132-6430
NSN 5935-01-381-0578
NSN 5950-01-085-6194
NSN 5910-00-851-3534
NSN 6650-01-382-8569
NSN 2925-01-525-8212
NSN 5895-01-200-1688
NSN 5910-00-102-4099
NSN 4140-01-481-4237
NSN 6130-00-816-1572
NSN 5950-00-804-6840
NSN 6135-01-245-5876