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 5925-01-634-0664
NSN 5965-01-122-7477
NSN 5920-00-432-7643
NSN 5935-01-354-0927
NSN 6240-01-110-6235
NSN 2925-00-684-7708
NSN 5925-01-645-7323
NSN 6320-00-139-1090
NSN 5935-01-170-0030
NSN 6620-01-415-5803
NSN 5985-01-422-5092
NSN 5920-00-470-2903