Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HP610503 3C1 found under Orifice Plug Assy by Tactair Fluid Controls Inc. The National Stock Number assigned to this part is 4810003504426, 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 HP610503 3C1.