Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 02W156-231 found under Cartridge Assembly by Falls Filtration Technologies In. The National Stock Number assigned to this part is 1615007589756, and the Federal Supply Class is 1615 Helicopter Rotor Blades Drive Mechanisms And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 02W156-231.