Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EDG-0502 found under Valve Safety Relief by Exceltec Intl Corp. The National Stock Number assigned to this part is 4820014787073, 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 EDG-0502.