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 6135-01-068-0119
NSN 5975-01-448-9638
NSN 7035-00-205-8739
NSN 5965-01-125-2312
NSN 5855-01-389-8884
NSN 5855-00-149-0766
NSN 5930-00-487-0874
NSN 5990-01-212-2037
NSN 2925-00-898-9135
NSN 5985-01-416-1223
NSN 6320-01-487-0336
NSN 6220-01-311-5764