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 6645-01-396-6976
NSN 5945-01-383-5900
NSN 6135-01-150-6916
NSN 6150-01-315-1867
NSN 5999-01-181-5469
NSN 6320-01-358-8069
NSN 6145-01-325-6786
NSN 5935-00-008-3083
NSN 5915-01-122-5515
NSN 5965-01-648-2314
NSN 6135-01-324-4692
NSN 5855-01-003-7102