Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 55C22166 found under Nut Wheel Towbar by C E I Inc. The National Stock Number assigned to this part is 5310008885174, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 55C22166.