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 5935-00-287-9898
NSN 5950-00-277-4701
NSN 5998-00-549-2661
NSN 5855-01-421-7691
NSN 6650-01-329-3055
NSN 6645-01-579-2898
NSN 5965-01-516-9960
NSN 5985-01-152-1191
NSN 6110-01-049-1679
NSN 6150-00-138-3068
NSN 5855-00-610-4052
NSN 6110-01-607-0891