Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HF644012-A1-450 found under Sector Shaft Assemb by Trw Inc. The National Stock Number assigned to this part is 2530011730068, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HF644012-A1-450.