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 5920-00-174-1657
NSN 5895-00-919-0413
NSN 6620-00-774-3638
NSN 6130-01-056-2097
NSN 2925-00-024-6392
NSN 4140-00-019-1697
NSN 6320-00-025-9910
NSN 6135-00-087-5300
NSN 5975-00-286-8506
NSN 5895-01-192-0262
NSN 6685-01-384-2844
NSN 5855-00-481-0019