chassis mounting screws

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AcornTheory

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Hi, anybody know the correct size/length of screw to mount a mark ivA chassis in a headshell? I have a rack mount model that I bought a shell for... has the upper mounting points. Thanks!

AT
 
I have a Mark IV head and rackmount. It don’t know how to measure the threads of the mounting screws. I can measure the length though.
 
That would help some! I've called Mesa a couple times but haven't heard back. I imagine its a low priority call :roll:
 
The short chassis use a #8-32 screw in 1 1/4". The 300 series use #10-24. I have one here that was tapped out to #10-32, I'm assuming the originals stripped.
 

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