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 6220-00-156-4469
NSN 5935-00-369-1092
NSN 5925-01-237-2501
NSN 6135-01-658-7467
NSN 6240-01-352-3642
NSN 5915-01-089-9836
NSN 6685-01-176-5745
NSN 5985-01-494-9543
NSN 6320-00-284-1524
NSN 5905-01-241-1745
NSN 6150-00-240-0873
NSN 6650-01-258-5871