Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SPX-2XX-1050R found under Switch Pressure by Nason Company The Inc. The National Stock Number assigned to this part is 5930005479391, 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 SPX-2XX-1050R.