Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3046 found under Valve Safety Relief by Mc Donald A Y Mfg Co. The National Stock Number assigned to this part is 4820002872189, 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 3046.