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 5990-01-147-5225
NSN 6240-01-542-9964
NSN 6145-00-461-5884
NSN 5950-00-107-4325
NSN 6110-01-519-5956
NSN 5950-01-127-5023
NSN 6240-00-269-3346
NSN 5960-00-553-7338
NSN 7035-00-997-6212
NSN 5996-01-561-2413
NSN 5985-00-148-6403
NSN 5998-00-839-7647