Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PA20397 2120 REV 3 ITEM 09 found under Switch Thermostatic by Alstom Power Conversion Usa Inc. The National Stock Number assigned to this part is 5930015503824, 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 PA20397 2120 REV 3 ITEM 09.