Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 257BPC8 found under Wrist Pin Actuator by Circor Intl Inc. The National Stock Number assigned to this part is 4820010321347, 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 257BPC8.