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 4140-00-919-5020
NSN 6130-01-529-2170
NSN 5999-01-495-1940
NSN 5985-00-899-6917
NSN 5945-01-055-0207
NSN 7035-01-323-0164
NSN 6620-01-183-8959
NSN 6150-01-266-3405
NSN 6240-00-543-9321
NSN 6135-01-159-9705
NSN 4140-01-327-3241
NSN 7035-01-217-6263