Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D63404 found under Shaft Shouldered by O T S I. The National Stock Number assigned to this part is 3040010542919, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D63404.