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 6650-01-459-2635
NSN 4140-01-196-5232
NSN 6105-00-578-0973
NSN 5950-01-231-2261
NSN 5920-01-425-2336
NSN 6220-01-270-7766
NSN 6320-00-466-0371
NSN 5960-00-921-5805
NSN 6110-01-152-2547
NSN 5855-01-447-3137
NSN 6135-01-492-8934
NSN 5905-01-478-9494