Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D3W-20-H-UU-18 found under Valve by Parker Hannifin Limited. The National Stock Number assigned to this part is 4820997297413, 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 D3W-20-H-UU-18.