Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K4382520 found under Spanner Attachment by Boeing Aircraft. The National Stock Number assigned to this part is 5120006039346, 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 K4382520.