Brand New ER40 Clamping Nuts Description Detail DIN6499B 0.013MM (0.0005") Run-Out Tolerance High Grade 1065 Carbon Steel Hardened & Precision Ground Design With Slots For C-Spanner Thread M50 x 1.5 D 63MM, L 25.5MM (See Image) Eccentric Retainer For Collet Auto-Release Black Oxide Finish.
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