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 6150-01-231-1685
NSN 6145-01-292-2496
NSN 5905-00-503-9920
NSN 6130-00-976-2180
NSN 5990-00-016-5648
NSN 6130-00-350-8136
NSN 5945-01-385-4559
NSN 6645-01-374-9936
NSN 4140-00-410-7868
NSN 5990-01-485-0260
NSN 7035-01-088-3023
NSN 5855-01-657-7657