Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 966C723-1 found under Washer Keyway by Sundstrand International Corporation. The National Stock Number assigned to this part is 5310012861727, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 966C723-1.