Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T20-77A3 found under Switch Code Indicating Wheel by Cherry Electrical. The National Stock Number assigned to this part is 5930014391138, 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 T20-77A3.