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 5960-01-399-4327
NSN 6130-01-630-7811
NSN 6240-00-578-6763
NSN 5998-00-974-8967
NSN 2925-00-194-7407
NSN 6610-01-178-5435
NSN 5960-01-258-5615
NSN 6610-01-236-8359
NSN 6320-01-290-0514
NSN 5990-00-450-9872
NSN 4140-00-679-9512
NSN 6610-01-426-5090