Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number Y643-5001-F110 found under Switch Pressure by Electric Boat Corporation. The National Stock Number assigned to this part is 5930016303438, 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 Y643-5001-F110.