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 5998-00-816-9752
NSN 5835-01-293-6453
NSN 6105-01-446-5610
NSN 5915-01-449-8409
NSN 4140-00-945-4055
NSN 6620-01-327-4111
NSN 7035-01-246-3086
NSN 5920-01-316-8286
NSN 2925-00-526-4541
NSN 6610-00-912-6374
NSN 7035-00-541-8516
NSN 5996-01-310-2986