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 6610-00-194-0676
NSN 6620-01-557-1941
NSN 5925-01-191-4285
NSN 7035-00-064-7008
NSN 5905-01-441-9534
NSN 5965-01-460-9743
NSN 5945-01-529-7321
NSN 6135-00-027-3914
NSN 6145-01-012-0804
NSN 5920-01-333-1314
NSN 5920-00-199-9514
NSN 6320-00-937-5625