What's this bolt size / type on rollbar?

[jax501]

Anyone know what size/type bolt goes into the roll bar's threaded hole in the back storage area of a 2 door JL?
See photo.

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[GATORB8]

Look at some of the accessories that use it. I want to say the ones I've seen had to get tapped out.

 

[jax501]

I tried a M8 x 30mm and it didn't fit.
M8 x 30mm fits the two holes that are in the side of that same roll bar facing that window, but not that visible hole in the photo.

 

[Terrymo]

@jax501
On the 4 door version it is not threaded but can be with a 3/8-16 tap

 

[jax501]

@Terrymo
Upon a closer look, that hole is not threaded on the 2-door either.
Will use your advice and tap it.

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