Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TER 31 MW 55 6A found under Valve Regulating Te by Emerson Electric Co. The National Stock Number assigned to this part is 4820015134677, 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 TER 31 MW 55 6A.