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 6620-01-068-4498
NSN 5920-01-072-0652
NSN 5855-00-361-0167
NSN 6135-01-375-6724
NSN 6650-01-302-8468
NSN 6130-00-541-8468
NSN 6320-00-925-0558
NSN 4140-01-101-4454
NSN 5985-01-241-3698
NSN 5935-00-871-5066
NSN 5945-01-420-5891
NSN 5999-01-529-5263