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    M4-0.70 Thread Mandrel For RN-1 Tool

    Part #: BR-M39366

    Threaded steel mandrel with M4 × 0.70mm thread designed for use with Marson RN-1 / 39300 Rivet Nut Setter tool; built to fit metric M4 rivet nuts, this precision replacement part enables correct installation of M4 inserts without damage or misalignment. Ideal for users needing only the mandrel component rather than a full kit.