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 4140-01-544-5464
NSN 6110-01-378-6499
NSN 6145-01-607-9746
NSN 4140-00-215-8593
NSN 5996-00-226-5364
NSN 6240-00-514-3507
NSN 5920-01-434-8504
NSN 5925-01-432-7603
NSN 6135-00-812-9039
NSN 6620-01-091-3722
NSN 5910-00-255-6228
NSN 6620-01-064-0366