Negative battery post nut/bolt size? (1 Viewer)

[Jonathan Case]

I stupidly removed the nut all the way from my negative battery post clamp and lost it down in a metal body pocket, perfectly placed to eat the thing (under the battery tray). Tried fishing it out, but it’s not possible. I went to O’Reilly’s and Ace to find a replacement nut, but none seem to fit the thread! Tried an m6, m7, different pitches… anyone know what kind of nut this is?

 

[javelinadave]

Looks like your problem is with the bold thread and not the 10mm nut

 

[hoser]

You can take the bolt out and bring into the store. Thread is boogered up a little. Might need replacement altogether.

 

[Super77]

10mm wrench, M6 thread on mine. Square head bolt if you don’t want it to spin in place.

 

[Eyedaho]

Yeah, you'll likely need to either replace the bolt or run it through a die to chase the threads. It looks like it fell victim to trying some different pitch nuts.

 

[Mike NXP]

As mentioned above your bolt threads are chewed up and a new nut may not spin on. Go to auto parts store instead and buy new square head battery bolt + nut, ideally metric with same size head as your + terminal so you don't need multiple wrenches to remove.

 

[Jonathan Case]

Thanks, team — I ended up just swapping out for a new m6 bolt. No square heads at the store, but it’ll do. Looks just the same as my old one in the not-chewed up part, but I dunno what happened. The m6 nut I tried first with the old bolt just would not go on there.