Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number J52039-103 found under Barrier Safety Main by The Boeing Company. The National Stock Number assigned to this part is 1680016330021, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like J52039-103.