Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0639547-9 found under Retainer And Rollers Bearing by Allis Chalmers Corp. The National Stock Number assigned to this part is 3110004708078, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 0639547-9.