ER20 A Type Collet Clamping Nut for CNC Milling Collet M25 x 1.5mm New.
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Jun 22, 2023 · An ER20A nut is 25mm x 1.5 with the hex. A ER20 compact is 24mm X 1.0. This one has groves in it istead of the hex. The original Langmuir nuts ...