Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BI3120221-01 found under Capstan Assembly Set by Bell Industries Inc. The National Stock Number assigned to this part is 7045001502398, and the Federal Supply Class is 7045 Adp Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BI3120221-01.