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 5996-01-517-0312
NSN 5895-01-213-3317
NSN 5910-00-617-0912
NSN 6240-01-437-9439
NSN 6145-01-348-0938
NSN 5855-01-410-8979
NSN 5855-01-145-4903
NSN 5895-01-174-8074
NSN 5925-01-477-4717
NSN 6650-00-127-4581
NSN 6135-00-635-9187
NSN 5985-01-555-7269