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 4140-00-479-3949
NSN 5945-01-381-6300
NSN 5985-01-196-7204
NSN 5910-01-228-6829
NSN 6220-00-035-6736
NSN 5910-01-452-1407
NSN 6610-00-575-7933
NSN 5985-00-078-9419
NSN 6110-01-328-3226
NSN 5935-01-456-4255
NSN 6220-01-412-7650
NSN 6240-00-289-7059