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Download the full catalogue, or just the series you need. Looking for CAD? STEP files are on each size's product page, find your size in the Product Finder.

Full Catalogue

NIKKI Precision Locknut

NIKKI Precision Locknut Catalogue 2022.pdf

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Best Flank Angle Locking

HKF Series

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HKR Series

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30 Degree Flank Locking

BF Series

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BFZ Series

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MF Series

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MFZ Series

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TMF Series

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SFZ Series

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Radial Locking

MR Series

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MRZ Series

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SR Series

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SRZ Series

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MRRA Series

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MRN Series, light-duty transmission

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MRS Series, Stainless

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Axial Locking

MKR Series

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MA Series

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MKK Series

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MKW Series

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Support & Sales Data

Installation Guide: Set Screw & Clamping Screw Locknuts

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Why NIKKI: Ground Thread Precision vs. Other Brands

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Technical Information: Torque & Axial Load Calculations

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Related Tools

Static Axial Load

Calculate the static axial load capacity for your selected locknut.

Torque Finder

Find the recommended tightening torque by locknut series and size.

Product Finder

Match the right precision locknut to your shaft size and application.