Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FM620SS found under Valve Flow Control by Navair And Navsea Managed. The National Stock Number assigned to this part is 4820003226916, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FM620SS.