Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 61P257 found under Diaphragm Actuator Valve Special by Abb Kent Taylor Inc. The National Stock Number assigned to this part is 4820002303531, 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 61P257.