Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DDE A4570300445 found under Crankshaft Bearing by W W Williams Midwest Inc. The National Stock Number assigned to this part is 4310016023071, and the Federal Supply Class is 4310 Compressors And Vacuum Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DDE A4570300445.