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 6105-00-275-0826
NSN 4140-00-915-6125
NSN 6220-00-339-2756
NSN 5925-01-581-0005
NSN 6145-01-102-2825
NSN 5999-01-449-6732
NSN 2925-00-234-7918
NSN 5925-01-255-8675
NSN 4140-00-597-5260
NSN 5910-01-295-7227
NSN 2925-00-010-9609
NSN 5990-01-226-6924