Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B2668 found under Pressure Element As by Westport International Inc. The National Stock Number assigned to this part is 4820003222190, 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 B2668.