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 6320-00-468-8421
NSN 5975-01-040-5203
NSN 5999-00-570-5530
NSN 5996-01-651-4195
NSN 5835-00-469-3395
NSN 6220-00-113-3166
NSN 5996-01-019-5794
NSN 5999-01-553-7010
NSN 5975-01-480-0972
NSN 4140-00-471-9577
NSN 5975-00-862-4506
NSN 4140-01-277-6355