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 4140-00-419-0631
NSN 5998-01-099-5202
NSN 6645-01-175-2155
NSN 6110-00-078-8565
NSN 6320-01-212-8749
NSN 2925-00-234-7918
NSN 5910-01-625-8216
NSN 6240-01-084-0501
NSN 5985-00-151-4538
NSN 6650-00-479-9329
NSN 5975-01-473-3574
NSN 5910-01-056-3531