Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E 41S SERIES33 4INCH found under Valve Regulating Fluid Pressure by Imi Cash Valve Inc. The National Stock Number assigned to this part is 4820006772248, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E 41S SERIES33 4INCH.