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 6620-01-423-0833
NSN 6240-01-441-3606
NSN 5935-01-442-6435
NSN 5990-01-056-0893
NSN 6145-00-519-2821
NSN 6150-01-366-2945
NSN 5915-01-486-7631
NSN 6240-01-420-7304
NSN 5895-00-677-1527
NSN 6620-01-314-3635
NSN 5855-00-058-1293
NSN 6645-01-290-3930