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 5915-00-590-8143
NSN 5925-01-649-9042
NSN 6145-00-399-5201
NSN 5975-01-421-2230
NSN 6620-01-116-3983
NSN 6645-01-384-0628
NSN 6240-01-225-8518
NSN 6645-01-361-8947
NSN 5920-01-206-0191
NSN 5935-01-338-5095
NSN 5905-01-138-2218
NSN 5855-01-068-8915