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 5915-01-109-5801
NSN 4140-01-360-3766
NSN 6135-01-526-6530
NSN 6620-00-269-5168
NSN 6320-01-449-1014
NSN 6105-01-056-5258
NSN 2925-01-464-3093
NSN 6620-00-764-6626
NSN 5835-01-416-6455
NSN 6320-01-108-5933
NSN 6610-00-167-2872
NSN 6240-00-409-8670