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 5999-01-261-0914
NSN 6320-01-078-8257
NSN 6130-01-029-8786
NSN 5945-01-339-0256
NSN 5915-01-357-5067
NSN 6135-00-812-9039
NSN 5925-01-432-1698
NSN 5905-01-617-4076
NSN 6240-00-433-2707
NSN 6645-01-163-9930
NSN 6135-01-475-1040
NSN 5996-00-161-4202