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 5975-00-083-1433
NSN 5965-00-139-4870
NSN 5915-00-445-9340
NSN 5975-01-422-2904
NSN 5910-01-449-3132
NSN 6105-01-070-2527
NSN 5920-01-417-1928
NSN 5925-00-492-5490
NSN 6620-00-950-5979
NSN 5910-01-487-3735
NSN 4140-00-056-0708
NSN 6620-00-400-4237