Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M0031939 found under Fan Spec by Eads Casa. The National Stock Number assigned to this part is 4710016029853, and the Federal Supply Class is 4710 Pipe Tube And Rigid Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M0031939.