Battery Post Thread size

[Jabs]

I have domestic batteries with the usual round posts and also a stud.

Can anyone tell me the thread size for the stud?

It is close to M8 but not metric, I suspect.

Thanks

 

[pvb]

The thread size will vary according to battery make.

 

[PaulRainbow]

I have domestic batteries with the usual round posts and also a stud.

Can anyone tell me the thread size for the stud?

It is close to M8 but not metric, I suspect.

Thanks

If it looks like M8 but it's imperial, it will be 3/8" UNC.

Some battery terminals are also M10, but i'm sure you can tell the difference between 8 and 10 mm

 

[pvb]

If it looks like M8 but it's imperial, it will be 3/8" UNC.

Some battery terminals are also M10, but i'm sure you can tell the difference between 8 and 10 mm

And some batteries use 5/16" UNC for the negative terminal.

 

[jim.howes]

Hi M8 converts to 5/16" and M10 converts to 3/8".

 

[RichardS]

My batteries use M8 for the negative post and M10 for the positive, I assume to avoid any mix-ups.

Richard

 

[RichardS]

Hi M8 converts to 5/16" and M10 converts to 3/8".

Although different threads, of course.

Richard

 

[matthewriches]

The Lucas batteries I fit have 3/8" studs on. I had some Banner batteries that had a large and a smaller one on - these were an imperial size also. Would have thought we'd have caught up to metric sizes on by now. Had a customer shear a stud off by trying to wind an M8 onto the terminal.....

I like the Victron and Lifeline AGM's as they have a flat tab with a hole for an M8 nut and bolt.

Hi M8 converts to 5/16" and M10 converts to 3/8".

 

[Jabs]

Why oh why can't these things be standardised?

Thanks to all.

I will be prepared with 3/8 and 5/16 nuts!

Tony

 

[ghostlymoron]

Look up your battery on a site site such as Battery Megastore - it should be given in the spec.

 

[macd]

Why oh why can't these things be standardised?

You might consider the degree of unanimity on, say, this forum. Then extrapolate that to a population approaching eight billion.

 

[PetiteFleur]

I have Battery Megastore batteries, 105AH from memory and they have M8 studs for both positive & negative terminals(as well as the usual round terminal posts)