Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MWH40W0 found under Switch Thermostatic by Sensata Technologies Inc. The National Stock Number assigned to this part is 5930010389674, 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 MWH40W0.