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 6240-01-560-0910
NSN 5905-01-019-2340
NSN 2925-01-149-0353
NSN 5996-00-254-2147
NSN 6320-00-701-0437
NSN 5960-01-322-8417
NSN 5960-01-296-8542
NSN 5920-00-257-2950
NSN 6110-01-386-3093
NSN 5930-00-679-7900
NSN 7035-01-111-7206
NSN 7035-00-870-0290