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How To - Identify Thread Direction
How to identify if the thread is lefthand or righthand.
How to identify if the thread is lefthand or righthand.
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<p><strong>Visual Inspection of Wheel Nuts</strong></p><ul><li><p>Check the end of the wheel nut or stud:</p></li></ul><p>LHT nuts are often stamped with “L” or an arrow pointing anti-clockwise.</p><p>RHT nuts are stamped with “R” or an arrow pointing clockwise.</p><p></p>

Visual Inspection of Wheel Nuts

  • Check the end of the wheel nut or stud:

LHT nuts are often stamped with “L” or an arrow pointing anti-clockwise.

RHT nuts are stamped with “R” or an arrow pointing clockwise.

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<p><strong>Vehicle Side</strong></p><p>On some commercial vehicles with a stud sleeve system:</p><ul><li><p>Left-hand side of the vehicle → Left-hand thread</p></li><li><p>Right-hand side of the vehicle → Right-hand thread</p></li><li><p>This design prevents nuts from loosening while the wheel is rotating forward.</p></li></ul><p></p>

Vehicle Side

On some commercial vehicles with a stud sleeve system:

  • Left-hand side of the vehicle → Left-hand thread

  • Right-hand side of the vehicle → Right-hand thread

  • This design prevents nuts from loosening while the wheel is rotating forward.

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<p><strong>Thread Direction Test</strong></p><ul><li><p>Place a wheel brace or socket on the nut and apply light pressure:</p></li><li><p>If turning anti-clockwise loosens, it is Right-hand thread (RHT).</p></li><li><p>If turning clockwise loosens, it is Left-hand thread (LHT). </p></li></ul><p>Do not force. If the resistance feels wrong&nbsp;re-check markings and consult service manager.&nbsp;</p><p></p>

Thread Direction Test

  • Place a wheel brace or socket on the nut and apply light pressure:

  • If turning anti-clockwise loosens, it is Right-hand thread (RHT).

  • If turning clockwise loosens, it is Left-hand thread (LHT).

Do not force. If the resistance feels wrong re-check markings and consult service manager. 

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