Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 489-231 found under Spring Helical Comp by Scomill Inc. The National Stock Number assigned to this part is 5360006701856, and the Federal Supply Class is 5360 Coil Flat Leaf And Wire Springs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 489-231.