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 6650-00-556-8054
NSN 5855-00-688-9954
NSN 6685-01-368-6107
NSN 5990-00-613-2279
NSN 5998-00-895-2722
NSN 6610-01-618-7038
NSN 6220-00-130-6215
NSN 5945-01-167-8498
NSN 5998-01-003-2258
NSN 6610-01-364-0294
NSN 5930-01-332-2330
NSN 4140-00-141-0132