Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6-02439A found under Diaphragm Valve Flat by Sentry Company. The National Stock Number assigned to this part is 4810015256678, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6-02439A.