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 6135-00-900-2139
NSN 6150-00-908-0782
NSN 6145-01-355-2279
NSN 5920-01-281-7354
NSN 6220-00-819-9325
NSN 5996-00-931-5803
NSN 5935-01-507-9958
NSN 5999-01-376-8977
NSN 6685-01-411-7113
NSN 6110-01-239-0573
NSN 5990-01-442-3520
NSN 2925-01-054-3190