Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12P1000 found under Valve Relief Re Cir by Allen Aircraft Products Inc. The National Stock Number assigned to this part is 4820015252284, 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 12P1000.