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 5905-00-666-4983
NSN 6135-00-448-5642
NSN 6220-00-346-8944
NSN 2925-00-436-9837
NSN 6130-01-111-2234
NSN 2925-01-222-7764
NSN 5925-00-539-5324
NSN 5925-01-276-0456
NSN 4140-01-012-2460
NSN 6220-01-153-1937
NSN 5975-00-297-3940
NSN 5910-00-980-0370