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 6320-00-831-2227
NSN 6240-01-535-8066
NSN 5930-00-248-6608
NSN 2925-00-816-8765
NSN 5945-01-540-6949
NSN 6645-00-359-5463
NSN 5915-01-240-8398
NSN 6150-00-061-8338
NSN 6150-01-464-5924
NSN 5920-00-702-6694
NSN 6685-00-411-2367
NSN 5990-00-125-5036