Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N7-437 found under Valve Safety Relief by Roper Industries Inc Roper Pump. The National Stock Number assigned to this part is 4820012891521, 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 N7-437.