Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MVP 631 found under Filter Assy Welding by Sulzer Metco Us Inc. The National Stock Number assigned to this part is 3433014698296, and the Federal Supply Class is 3433 Gas Welding Heat Cutting And Metalizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MVP 631.