Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PN87220 12 found under Valve Regulating Fluid Pressure by Babcock Inc. The National Stock Number assigned to this part is 4820016641092, 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 PN87220 12.