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 6650-00-393-0447
NSN 5990-00-874-3036
NSN 2925-01-647-7225
NSN 5998-01-433-2846
NSN 2925-01-515-7026
NSN 6240-01-608-3269
NSN 5920-01-576-2397
NSN 5990-01-157-0441
NSN 5930-01-502-6910
NSN 5999-00-120-0206
NSN 6105-01-421-2644
NSN 6320-00-456-0836