Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HFC04N021OHM0 4A found under Switch Thermostatic by Spx Corp. The National Stock Number assigned to this part is 5930014325202, 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 HFC04N021OHM0 4A.