Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4073PCSSWCH found under Switch Starting by Western Sky Industries Inc. The National Stock Number assigned to this part is 5930000286949, 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 4073PCSSWCH.