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 5855-01-294-2804
NSN 5930-01-544-0238
NSN 5950-00-113-0034
NSN 4140-00-075-2000
NSN 5985-00-019-6317
NSN 5960-01-495-0859
NSN 5990-00-840-6571
NSN 5905-00-555-1899
NSN 5930-01-238-2907
NSN 5945-01-113-7250
NSN 2925-01-517-8544
NSN 5960-00-038-5433