The RAM-B-349-1U includes a M10 x 1.5 pitch male thread connected to a 1" rubber ball. The diameter of the round flange is 14.3mm and the thread length is 10.5mm.

RAM 1" Ball w/ M10 X 1.5 Pitch Male Thread (RAM-B-349-1U)
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The RAM-B-349-1U includes a M10 x 1.5 pitch male thread connected to a 1" rubber ball. The diameter of the round flange is 14.3mm and the thread length is 10.5mm.