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 5960-01-553-4557
NSN 6240-01-322-4887
NSN 6145-01-382-1175
NSN 5935-00-204-9909
NSN 5945-01-398-9559
NSN 5855-01-544-1480
NSN 5930-00-369-4140
NSN 4140-00-908-2763
NSN 5930-00-059-7398
NSN 5965-00-804-1374
NSN 5915-00-543-0553
NSN 6135-00-497-0491