Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VLV1 2NPT 3120 found under Valve Safety Relief by Mmc International Corp. The National Stock Number assigned to this part is 4820010337904, 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 VLV1 2NPT 3120.