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RMC5446

J-185 Truss Rod Size

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Hello - does anyone know the size truss rod wrench needed for a J-185 Acoustic reissue?  I purchased in the early 2000s.  I bought a 5/16th and it's too small and wanting to confirm prior to buying another size.  Thank you for the help!

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That's strange- 5/16" is considered to be the right size. I use an 8mm socket. fyi: 5/16" converts to 7.9375mm. 

One thing, though- the wall of the socket you're using might be too much for the snug quarters where the tr adj nut resides.

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With Gibson guitars, the truss rod nut is often enveloped in lacquer or the truss rod cavity, while not too small itself, has a thick coat of lacquer so that you often need, for the first few times anyways, to use a little force to get the truss rod socket properly connected onto the nut. Your guitar should have come with the right truss rod wrench. If in doubt, buy a new one, or the multitool, directly from Gibson.

Edited by Leonard McCoy

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Thank you - I believe that what's happened is that the one I purchased from Amazon isn't actually a 5/16 size.   Let me get another one and I bet it'll work.  

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okay - yes, so the one purchased from Amazon was definitely not 5/16 despite it being labeled as such.  I bought a new one that actually is 5/16 and it works great!  Thank you all for responding.  

Keep rocking!

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