Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 77B-2X2AL found under Valve Angle by Opw Fueling Components Inc. The National Stock Number assigned to this part is 4820008879519, 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 77B-2X2AL.