Doug Elliot Thread Pitch

[Todd S. Malicoate]

I don't have one to check, David, but I have a suggestion:

Take the male-threaded part of the mouthpiece to an auto parts store and someone there should have a thread pitch gauge to check it with. Check both standard and metric if you can (it will probably line up with one of each). A micrometer would also be handy to check the size of the threads, but it's pretty dicey checking male threads for size - it never seems to line up exactly, and I still haven't figured out if you measure the smallest diameter (between the threads) or the largest (on top of the threads).

Try to find one of the more "professional" parts houses that have full-timers that have been selling parts for a while - part-time college guys working at a chain store won't have their own thread gauge, but old-timer pros will.

[Dean E]

I don't have one to check, David, but I have a suggestion:

Take the male-threaded part of the mouthpiece to an auto parts store and someone there should have a thread pitch gauge to check it with. Check both standard and metric if you can (it will probably line up with one of each). A micrometer would also be handy to check the size of the threads, but it's pretty dicey checking male threads for size - it never seems to line up exactly, and I still haven't figured out if you measure the smallest diameter (between the threads) or the largest (on top of the threads).

Try to find one of the more "professional" parts houses that have full-timers that have been selling parts for a while - part-time college guys working at a chain store won't have their own thread gauge, but old-timer pros will.

Try a machine shop or tool and die shop.

FYI, a micrometer with 60-degree anvils is used for measuring outside threads. You obtain a "pitch diameter," which is a theoretical diameter midway between the bottom (root diameter) and top of a sharp thread.

Some products use non-standard, proprietary threads to prevent copying of their products. I don't say that mouthpieces are made that way, only warning not to get one's hopes up.

Planning on setting up a lathe to cut some external threads?

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