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 5905-00-243-1989
NSN 6645-00-864-6794
NSN 5895-00-202-1026
NSN 5985-01-343-4607
NSN 5999-01-359-4934
NSN 2925-00-526-4541
NSN 6150-00-525-3007
NSN 5905-01-066-9337
NSN 6105-00-752-2560
NSN 6145-00-284-1514
NSN 6320-00-456-2092
NSN 6135-00-087-5300