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 5835-01-177-1092
NSN 5990-01-320-9817
NSN 5950-01-130-5211
NSN 6620-01-088-1272
NSN 6220-01-453-4975
NSN 6610-00-371-5953
NSN 6135-01-527-3598
NSN 5895-00-409-5139
NSN 5960-01-378-1729
NSN 6240-01-275-1013
NSN 6320-01-612-7035
NSN 6240-01-038-0821