Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3120 21339 2 found under Runner by Selex Es Ltd. The National Stock Number assigned to this part is 5340014701765, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3120 21339 2.