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 6220-01-128-0087
NSN 6685-01-433-1567
NSN 6240-01-558-8379
NSN 5910-01-442-8987
NSN 5935-01-466-0404
NSN 6650-01-351-9061
NSN 6105-01-418-0824
NSN 7035-01-326-3875
NSN 6620-00-516-3204
NSN 4140-00-787-8531
NSN 6240-01-508-7107
NSN 5910-01-553-8553