Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NW000396 found under Parts Kit Vent Valve by Hdt Expeditionary Systems Inc. The National Stock Number assigned to this part is 4820015214328, 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 NW000396.