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 5999-01-186-0407
NSN 5930-01-219-7547
NSN 5915-00-007-3813
NSN 5920-01-428-6110
NSN 6685-00-325-2752
NSN 6610-01-524-0636
NSN 2925-00-491-3549
NSN 5925-01-554-9486
NSN 5935-00-397-4114
NSN 5895-01-261-3094
NSN 5895-00-184-8756
NSN 6105-01-344-6625