Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 221 01 089 found under Switch Thermostatic by Recon Opticalinc. The National Stock Number assigned to this part is 5930009006614, 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 221 01 089.