Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 407FEA 1 2K55 found under Valve Expansion by Singer Co The. The National Stock Number assigned to this part is 4820008343155, 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 407FEA 1 2K55.