Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S4A 15 8 found under Valve Solenoid by United Refrigeration Inc. The National Stock Number assigned to this part is 4810012413450, 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 S4A 15 8.