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 6150-00-553-5178
NSN 5960-01-337-2823
NSN 6620-00-626-8126
NSN 5999-01-087-8346
NSN 5960-00-687-1031
NSN 5925-01-421-4473
NSN 5915-00-992-0968
NSN 5855-01-356-2759
NSN 4140-01-444-1033
NSN 6130-01-232-1222
NSN 5965-01-189-4805
NSN 5975-01-532-1432