A trunicated cone-shaped metal item generally tapered along its entire peripheral length, with a centrally located hole. It may be split (cut) through the material parallel to the axis.
NSN 5905-01-471-0141
NSN 6650-00-135-7484
NSN 5835-00-763-2938
NSN 5990-00-147-3144
NSN 5905-01-323-6486
NSN 6240-01-338-8090
NSN 6320-00-405-2348
NSN 6685-00-168-4416
NSN 6145-01-522-2892
NSN 5920-00-373-3636
NSN 6110-00-181-4303
NSN 5915-01-631-7940