Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 239AW 70 280L5 8 found under Valve Regulating Fluid Pressure by Singer Co The. The National Stock Number assigned to this part is 4820011365420, 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 239AW 70 280L5 8.