Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TJL1800HW100-1B found under Valve Expansion by Emerson Electric Co. The National Stock Number assigned to this part is 4820005370233, 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 TJL1800HW100-1B.