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 5999-01-557-4465
NSN 5925-01-330-3976
NSN 5999-01-322-9511
NSN 7035-00-179-3924
NSN 6610-01-514-8898
NSN 5925-00-926-0863
NSN 6610-01-061-8466
NSN 6650-01-113-6689
NSN 5990-01-102-8342
NSN 5835-00-733-9145
NSN 6685-00-068-0933
NSN 6220-01-148-9021