Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28NP NO 50DEGF SOLDER SEAL found under Switch Thermostatic by Ulanet George Co. The National Stock Number assigned to this part is 5930009435862, 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 28NP NO 50DEGF SOLDER SEAL.