Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6631687 1 found under Housing Mechanical Drive by Raytheon Company. The National Stock Number assigned to this part is 3040016631638, 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 6631687 1.