Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3131-1B250 found under Switch Pressure by Honeywell Intl Inc. The National Stock Number assigned to this part is 5930002966194, 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 3131-1B250.