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 5998-00-894-6285
NSN 5915-01-203-4322
NSN 5990-01-177-1613
NSN 6135-00-990-1822
NSN 5905-01-533-6232
NSN 5895-00-436-0355
NSN 6650-01-415-1870
NSN 5920-01-420-0912
NSN 5920-00-809-7802
NSN 4140-01-123-4881
NSN 4140-00-653-5245
NSN 6620-00-959-6614