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 5998-01-163-7141
NSN 4140-01-418-7534
NSN 6240-00-841-0189
NSN 5999-00-789-8195
NSN 5998-01-602-0419
NSN 6240-00-223-5058
NSN 5985-00-288-6001
NSN 5990-00-934-3145
NSN 6240-00-403-1272
NSN 5990-00-754-2842
NSN 7035-01-485-2134
NSN 5996-01-467-9391