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 5835-00-458-4392
NSN 6220-01-429-9538
NSN 5915-01-076-4538
NSN 6145-01-031-9512
NSN 5990-01-018-3953
NSN 5950-01-418-5646
NSN 4140-00-334-4762
NSN 5895-01-571-6008
NSN 6130-01-057-6518
NSN 5930-01-285-8368
NSN 5935-01-300-9855
NSN 5925-00-227-0396