Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 353A-QNS found under Valve Regulating Sy by Henry Technologies Inc. The National Stock Number assigned to this part is 4820012355696, 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 353A-QNS.