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 5935-00-772-0873
NSN 5835-00-733-9145
NSN 5915-01-178-0238
NSN 4140-01-229-5143
NSN 6620-00-165-1749
NSN 5930-00-269-3330
NSN 4140-00-587-7496
NSN 2925-01-069-5324
NSN 5998-00-583-6570
NSN 5930-01-412-1416
NSN 6220-01-627-5380
NSN 5855-01-579-9859