Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ACL50172-E500 found under Valve Solenoid by United Technologies Corporation. The National Stock Number assigned to this part is 4810010656623, 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 ACL50172-E500.