Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 24171 found under Adapter Fastener Installation To by Zephyr Manufacturing Co Inc. The National Stock Number assigned to this part is 5120006055384, 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 24171.