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 5999-00-664-1818
NSN 2925-00-346-6968
NSN 5855-01-364-1005
NSN 5910-01-304-9768
NSN 5985-01-519-1359
NSN 5935-01-519-9349
NSN 5855-01-231-4945
NSN 5990-01-421-5342
NSN 6145-01-499-9085
NSN 5999-01-342-8418
NSN 7035-01-559-2440
NSN 6645-00-256-4072