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 5855-01-409-1792
NSN 6105-01-393-7429
NSN 4140-00-466-9268
NSN 5985-01-661-0166
NSN 6650-01-303-7763
NSN 6610-01-432-5144
NSN 6320-01-352-5653
NSN 5930-01-634-0659
NSN 5915-01-062-0592
NSN 4140-00-365-2531
NSN 6685-01-485-6517
NSN 6240-01-512-1856