Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LFEM949 99 found under Valve Purge by Lfe. The National Stock Number assigned to this part is 4820016204809, 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 LFEM949 99.