Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS68.006.1.3 8233 FIGURE 21 found under Buzzer by Sabbamerica East Inc. The National Stock Number assigned to this part is 6350012992353, 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 MS68.006.1.3 8233 FIGURE 21.