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 4140-01-541-9142
NSN 5930-00-334-4945
NSN 6620-01-185-3017
NSN 5998-01-252-7390
NSN 6645-01-468-4990
NSN 5930-01-327-3673
NSN 5999-01-003-6091
NSN 5855-00-688-9954
NSN 6145-00-735-6257
NSN 6645-01-199-7553
NSN 5835-01-339-0542
NSN 6240-01-167-2774