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 5920-01-171-0324
NSN 6145-01-415-3978
NSN 6150-01-519-9309
NSN 5925-00-249-1287
NSN 6105-00-248-0110
NSN 5905-00-521-2437
NSN 5895-01-415-4739
NSN 5930-01-319-6636
NSN 6645-01-425-1673
NSN 5915-01-433-0276
NSN 5935-01-395-5018
NSN 6620-00-280-2874