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 6320-01-429-9871
NSN 5990-00-373-9787
NSN 5999-00-277-4257
NSN 5998-00-301-0216
NSN 4140-00-813-9557
NSN 5998-01-622-4315
NSN 6150-01-441-3626
NSN 5920-01-258-6360
NSN 2925-01-462-1620
NSN 7035-00-188-6674
NSN 5999-01-410-9792
NSN 5950-01-384-1959