Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FIT221 3-64YELL0 found under Insulation Sleeving Electrical by Alpha Wire Corporation. The National Stock Number assigned to this part is 5970007872313, and the Federal Supply Class is 5970 Electrical Insulators And Insulating Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FIT221 3-64YELL0.