How to Fix a Stripped Lug Nut Bolt

Written by colin rowe
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How to Fix a Stripped Lug Nut Bolt
Rethreading a lug nut bolt requires a steady hand. (nut & bolt 2 image by Skip Haywood from Fotolia.com)

A bolt will need to be rethreaded when the ridges around the outside of the bolt, which hold it in place, break. This can, depending on how the bolt is being used, lead to unsecured wheels, leakages and increased mechanical wear. Rethreading a bolt is in itself not a difficult task, but it does require concentration and a steady hand to do it properly.

Skill level:
Easy

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Things you need

  • Bolt
  • Vice
  • Metal die
  • Spanner
  • Tape measure
  • Lubricating oil

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Instructions

  1. 1

    Remove the stripped nut. You may be able to do this using a socket set, but a vice grip is likely to be more successful. Spray the bolt with spray oil, secure the bolt in the vice grip and turn firmly until the nut can be removed by hand.

  2. 2

    Secure the bolt vertically in a vice so the thread is pointing up.

  3. 3

    Measure the end of the bolt to establish its width.

  4. 4

    Insert the correct-sized tool into the metal die using the Allen key bolt to loosen and tighten the tool.

  5. 5

    Place the die on top of the bolt, ensuring it is completely level. It you rethread, or tap, a bolt at an angle it will not screw in and will be impossible to rectify.

  6. 6

    Add a little oil to ease the rethreading process. You will need to do this at regular intervals to get the best results.

  7. 7

    Rotate the metal die clockwise to start rethreading the bolt.

  8. 8

    Turn the metal die counterclockwise a quarter turn every full rotation clockwise to break off any metal fragments remaining on the thread.

  9. 9

    Carefully turn the metal die counterclockwise all the way off when the bolt is completely rethreaded. Do this slowly so you do not accidentally break the thread again.

  10. 10

    Reinsert the bolt back where it came from.

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