Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W1 FW22-17 found under Guard Switch by Williams Pyro Inc. The National Stock Number assigned to this part is 5930011503397, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like W1 FW22-17.