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 6620-01-200-8176
NSN 5999-01-006-4616
NSN 5990-00-713-9016
NSN 6240-00-522-6009
NSN 5915-00-655-1804
NSN 5920-01-305-3613
NSN 5990-00-003-0569
NSN 6105-01-166-2387
NSN 6620-00-308-2531
NSN 5855-00-930-9478
NSN 5855-00-301-1176
NSN 4140-01-499-8906