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 5915-01-371-9729
NSN 5965-01-321-9598
NSN 6320-01-512-2031
NSN 5930-00-523-8529
NSN 5920-00-011-4995
NSN 7035-01-263-3399
NSN 5855-01-218-3735
NSN 5930-01-215-6768
NSN 5895-01-604-6572
NSN 5975-01-024-8486
NSN 5960-01-036-3839
NSN 6685-01-504-1292