Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 74A550645-2001 found under Retainer Inlet Outl by Mc Donnell Douglas Corp. The National Stock Number assigned to this part is 1560011258618, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 74A550645-2001.