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 6145-00-925-0767
NSN 4140-00-289-9263
NSN 6105-00-208-7497
NSN 5965-00-146-6561
NSN 5895-00-081-3293
NSN 6110-01-319-3585
NSN 6610-00-104-8223
NSN 5935-00-349-7200
NSN 6610-00-522-7670
NSN 6110-01-290-8801
NSN 6135-00-152-8729
NSN 5960-01-539-1956