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NEMA 17 Slip-On Cable Strain Relief Collar
A split collar that slides over the 42.3 mm square body of any NEMA 17 stepper. It clamps with one M3 screw and a captured nut. A flat tab on the collar has two pairs of zip-tie slots, so a tug on the motor lead pulls on the printed tab instead of the fragile 6-pin connector or the solder joints. The square bore is 43 mm, the collar is 12 mm tall, the whole part is 78 mm long, and no holes need drilling.
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