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 5920-01-254-8409
NSN 4140-01-583-1158
NSN 5975-01-573-6112
NSN 5960-01-552-0862
NSN 5920-00-112-4341
NSN 5950-01-658-7864
NSN 5925-01-112-5405
NSN 5915-01-175-8328
NSN 5925-01-262-0759
NSN 5990-00-548-6163
NSN 5905-01-181-4016
NSN 6150-01-423-0932