Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 617-501 found under Valve Linear Direct by I T E Imperial Corp Subsidiary Of. The National Stock Number assigned to this part is 4810009996564, 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 617-501.