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 5965-01-009-9090
NSN 5975-01-126-9863
NSN 6220-00-073-6888
NSN 5990-01-633-9503
NSN 5999-01-377-9907
NSN 5996-00-373-9001
NSN 5835-01-303-6563
NSN 6145-00-234-6337
NSN 5996-01-562-0855
NSN 5895-01-154-0151
NSN 5855-00-149-0766
NSN 5930-00-323-8421