Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645723400 found under Brake Electric by Duffnorton Co Inc. The National Stock Number assigned to this part is 6110013077362, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 645723400.