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 6620-01-297-5576
NSN 5920-01-264-4950
NSN 6240-01-621-9941
NSN 6685-00-302-5727
NSN 5915-00-244-2835
NSN 6645-01-425-2330
NSN 5835-01-568-7796
NSN 5895-01-167-8000
NSN 6240-01-625-7262
NSN 5990-00-381-6113
NSN 5925-01-139-3866
NSN 6610-00-111-3648