Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 400-6640224 found under Periscope Subassembly by Scandia Manufacturing Coinc. The National Stock Number assigned to this part is 1240013203051, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 400-6640224.