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 6110-01-245-2312
NSN 4140-01-423-9453
NSN 5905-01-406-2368
NSN 6135-00-477-8847
NSN 5905-00-008-3367
NSN 6620-01-303-2563
NSN 6135-01-419-9699
NSN 5935-01-282-4086
NSN 5935-01-518-4161
NSN 5930-00-246-5215
NSN 6135-01-528-6896
NSN 5998-01-459-2545