Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TC77U433-1 found under Insert Packaging by Ta Instrument Case Co. The National Stock Number assigned to this part is 8135012943354, and the Federal Supply Class is 8135 Packaging And Packing Bulk Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TC77U433-1.