Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40POPAL8000A found under Disk Valve by Ever Tite Coupling Co Inc. The National Stock Number assigned to this part is 4820014081649, 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 40POPAL8000A.