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 5855-00-107-7993
NSN 6150-00-891-7922
NSN 5905-00-870-0136
NSN 6645-01-289-2950
NSN 6130-01-619-2229
NSN 5855-01-018-1247
NSN 6135-00-921-6487
NSN 5985-01-225-7274
NSN 5930-01-240-4923
NSN 5965-01-258-5662
NSN 6685-01-286-5047
NSN 6620-01-394-0365