Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W4219BBS8 found under Gear Set Helical Ma by Siemens Demag Delaval Turbomachi. The National Stock Number assigned to this part is 3020009879920, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like W4219BBS8.