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I over-tightened the following bolt on my metering assembly. Axo of metering assembly picturing the bolt which I've over-tightened.

The bolt now looks like this — you'll notice that it isn't too damaged but I've certainly done some damage.

Damage of bolt near the tip showing some stripping.

I am tempted to simply order a new bolt, re-insert more gently, and tighten it down. But I am concerned I might then place the assembly itself in jeopardy, and that's a far harder thing to just replace.

Given the damage on the bolt, what might a pragmatic mechanic more experienced than I do in this situation?

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To continue using that bolt, I would grind that damaged section down , just like some bolts that have a lead on them.

Of course, before trying it again I would run a tap into the hole to clean that thread. If you have a replacent bolt the hole thread would need cleaning anyway.

If you don’t have a tap, an old bolt can be made into a « tap » with a cut from a hacksaw.. A trick that can rescue one out in the field when sources are limited.

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  • Perfect, thanks. I've ordered a replacement bolt already. Is it as simple as putting grooves in like pictured here? It looks like the threads on the bolt end are tapered in addition to having been notched. Need I do that? If so, looks like I should grind down the first few thread levels and then notch it as pictured. Let me know if you'd recommend differently.
    – Karoh
    Commented Aug 30, 2020 at 23:45

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