Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 041201 found under Valve Vent by Harris Environmental Systems Inc. The National Stock Number assigned to this part is 4820012483329, 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 041201.