Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9C-02871-006 found under Valve Check by Wausau Equipment Company Inc. The National Stock Number assigned to this part is 4820012401876, 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 9C-02871-006.