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 5999-00-443-1878
NSN 5930-00-721-3328
NSN 6240-01-487-7898
NSN 6320-01-516-3836
NSN 5930-01-218-7376
NSN 5996-00-701-9550
NSN 5915-01-543-7031
NSN 6220-01-631-8599
NSN 6685-01-244-5768
NSN 5930-01-429-7134
NSN 6220-01-501-2784
NSN 6145-01-329-3685