Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TS21387-105 found under Rotor Electrical Sw by Multi Tech Industries Inc. The National Stock Number assigned to this part is 5930009197786, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TS21387-105.