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 4140-01-457-9747
NSN 6240-01-482-4819
NSN 6685-01-137-1411
NSN 5965-01-592-3051
NSN 2925-01-250-2731
NSN 6135-01-528-6896
NSN 7035-00-753-0695
NSN 6610-01-160-8815
NSN 6150-01-128-3227
NSN 5935-01-543-3961
NSN 5920-01-141-1741
NSN 5905-01-607-6903