Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ZZAUT004B23 found under Actuator Electro Pneumatic by Coltec Industries Inc. The National Stock Number assigned to this part is 4810015477161, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ZZAUT004B23.