Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B120 found under Valve Gate by Stockham Valves And Fittings Inc. The National Stock Number assigned to this part is 4820008269949, 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 B120.