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 5975-01-495-6171
NSN 4140-01-432-0855
NSN 6130-00-276-0658
NSN 5915-01-415-8987
NSN 5920-01-613-2141
NSN 6105-00-016-7145
NSN 7035-01-550-8549
NSN 6240-01-399-2493
NSN 6610-01-246-4164
NSN 5925-01-081-7253
NSN 6240-00-999-7806
NSN 5960-01-231-3484