The plum blossom interface on the aviation connector can be processed by cold punching or PCM rotary cutting. The bottom hole is first drilled on the workpiece. The small cold punch can be used to complete the punching of the pentagonal plum blossom. It can also be used PCM rotary tool holder, plus five-point plum punch, plum punch, hexagonal punch, can be rotated feed punching forming! Replace the original milling cutter milling, the hexagon socket punch aviation connector has high output efficiency.