Battery wing nut size

On some batteries the positive are 3/8' and the negative are 5/16", others, both are 5/16. I keep a couple of each in the trailer spare parts bin.

red31 wrote:
energizer specs https://www.eastpennmanufacturing.com/wp-content/uploads/Marine-Master-Spec-Sheet-0194.pdf

Thank you

wing_zealot wrote:

swimmer_spe wrote:

BurbMan wrote:
Yes, most common size is 5/16-18 threads here in the US. Not sure if Canadian batteries would have metric studs?

I know it's not metric as one has studs that fit a 1/2 inch wrench.

Right there is your answer, if its 1/2 inch nut/wrench it's a 5/16 inch bolt.

Thank you.

clicky

IF the OP knew the actual battery model, this would provide the answer needed.

energizer specs https://www.eastpennmanufacturing.com/wp-content/uploads/Marine-Master-Spec-Sheet-0194.pdf

wing_zealot wrote:

swimmer_spe wrote:

BurbMan wrote:
Yes, most common size is 5/16-18 threads here in the US. Not sure if Canadian batteries would have metric studs?

I know it's not metric as one has studs that fit a 1/2 inch wrench.

Right there is your answer, if its 1/2 inch nut/wrench it's a 5/16 inch bolt.

My batts are threaded 8 mm. Standard wrench size for 8 mm is 13 mm which is almost indistinguishable from a 1/2" wrench.

My Centennial batteries are 8 mm. FYI

But it could be and could be a 13mm hex, although I don’t believe I’ve ever come across a metric thread battery post.
They’re either 5/16 NC or 3/8 NC. 1/2” and 9/16” wrench respectively.

swimmer_spe wrote:

BurbMan wrote:
Yes, most common size is 5/16-18 threads here in the US. Not sure if Canadian batteries would have metric studs?

I know it's not metric as one has studs that fit a 1/2 inch wrench.

Right there is your answer, if its 1/2 inch nut/wrench it's a 5/16 inch bolt.

See if someone has an assorment of nuts you can try. Using the one that fits buy the wing nuts.