Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BT389T-9B found under Adapter Tool by Oceta. The National Stock Number assigned to this part is 5120012557894, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BT389T-9B.