No backlash and no disconnection: solderless 9-pin universal type, universal 9-pin serial port RS232 interface, RS485 interface, RS422 interface and other DB9 type communication interfaces. All punching needles/copper pin cores are gold plated according to industrial standards, with strong contact and stable transmission. Stable double-layer nickel plating wraps the interface part of the plug.< /p> Pure copper terminal Shell: the wiring hole is large, the pressure line is tight, and the wiring/change line is convenient. The PVC shell is resistant to oil and pressure, and the shell can be disassembled repeatedly Name: DB9 solderless connector Model: male head with nut Rubber core: black electrostatic rubber core p> Pin: pure copper plated with 24H salt spray gold Shell size: length: 53mm, width: 35mm, height 19mm. Sleeve specifications tail length: 5MM 7MM 9MM 10MM Features: The joint adopts a 24-hour salt spray test shell, and the screw locking method is adopted, and the shell is locked more firmly. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin