Mfr parts list lists item material as "felt"
No other part numbers with same form, fit, and function found.
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 5975-00-943-1959
NSN 5975-01-577-9703
NSN 5910-01-384-1924
NSN 4140-01-322-8491
NSN 5975-01-076-2584
NSN 5965-01-534-7152
NSN 5998-00-757-5418
NSN 6650-01-376-5934
NSN 5920-00-669-9391
NSN 6685-01-016-0421
NSN 5975-01-381-2763
NSN 5965-00-529-0602