Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 71C-4GD found under Valve Moisture Drai by Auto Valve Inc. The National Stock Number assigned to this part is 4820010503478, 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 71C-4GD.