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 5998-01-368-5042
NSN 4140-01-459-6069
NSN 5855-01-302-9778
NSN 6610-01-488-5090
NSN 5960-00-688-7510
NSN 6610-01-541-5034
NSN 5950-01-135-4531
NSN 7035-00-369-6346
NSN 6240-01-187-6878
NSN 7035-00-153-3826
NSN 6320-01-574-1915
NSN 5855-00-885-8452