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 6320-00-646-3311
NSN 6110-00-099-7113
NSN 6645-01-299-7806
NSN 5855-01-301-0158
NSN 5985-00-151-4538
NSN 5990-01-499-6930
NSN 6130-00-851-2767
NSN 5996-00-850-0118
NSN 6145-01-298-7366
NSN 5985-01-089-9020
NSN 6645-01-343-1676
NSN 6145-00-990-9700