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#1
09-08-2022, 08:25 AM
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Mortise and tenon neck bolt size?
Does anyone know what size the Martin mortoise and tenon neck bolt is? I know this isn’t technically a bolt on neck but I have read many threads that indicate the bolt is definitely structural. A little background; I recently purchased a used gpcpa4 for an incredible price, however the neck angle isn’t very good and there is a small gap at the lower part between the neck and body. I have read these use a mortise and tenon neck joint that has a bolt that can come loose and cause the glue to become less stable and cause this gap. I also read that tightening the bolt can help close the gap and get the neck back to a better angle.
So upon discovering this info I took off the little piece of wood covering the bolt and to my surprise, there is no screw, just the thread, meaning the bold was removed. I would like to get a replacement bolt to help add more structural integrity to the joint until I can get it properly fixed. 
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#2
09-08-2022, 08:41 AM
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The thread is 1/4 - 20. Phillips head.
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#3
09-08-2022, 10:24 AM
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Quote:
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#4
09-08-2022, 01:32 PM
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Bolt
Sounds like a good reason to give Martin Customer service a call. They’re very helpful.
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1995 Taylor 412 1995 Taylor 612C Custom, Spruce over Flamed Maple 1997 Taylor 710 1968 Aria 6815 12 String, bought new
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