Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DA90970 found under Disk Valve by Richards Industries Valve Group. The National Stock Number assigned to this part is 4820014140365, 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 DA90970.