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 6220-01-264-0861
NSN 6645-01-566-3205
NSN 6620-00-575-9230
NSN 6110-01-584-4407
NSN 5835-00-503-2608
NSN 5855-01-412-5147
NSN 6145-01-317-7445
NSN 5945-01-435-4909
NSN 4140-01-446-4984
NSN 4140-01-459-3825
NSN 5910-01-040-7576
NSN 5960-01-544-1273