Threaded slot on od for locking setscrew
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 5905-01-181-6561
NSN 6610-01-076-4800
NSN 6145-01-209-5197
NSN 5996-01-141-6916
NSN 5950-01-479-4038
NSN 5920-01-555-6944
NSN 6145-01-368-4894
NSN 6240-00-398-0740
NSN 5975-01-656-9772
NSN 4140-01-048-5472
NSN 4140-01-460-8112
NSN 5999-00-793-4273