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 6240-01-276-9417
NSN 6645-01-491-5553
NSN 5975-01-555-5657
NSN 5950-00-929-2632
NSN 6320-01-429-9871
NSN 5925-01-112-4235
NSN 5996-01-091-4836
NSN 5835-01-512-4834
NSN 5965-01-084-6921
NSN 2925-01-570-3696
NSN 5975-01-400-4183
NSN 6645-00-337-8276