<b>Flammi Metric M6 Barrel Nut </b> <br>Inner diameter/threaded hole diameter: 5.35mm <br>Thread pitch:1mm <br>Outer diameter: 10mm <br>Total length:12mm <br>Used with Metric M6 bolts. PLEASE NOTE These M6 barrel nut does Not work with Imperial 1/4-20 bolts <br><br>Please feel free to contact us for any problem, we are always standing by.