Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7240-4020 found under Switch Code Indicating Wheel by Johns Hopkins University Applied. The National Stock Number assigned to this part is 5930011814638, 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 7240-4020.