There are two different common threads widely used on abrasive blast nozzles and blast nozzle holders. We generally called them Coarse Contractor Thread and Fine Standard Thread.
Full Thread vs. Partial Thread Screws
HSP-9 Wet Shotcrete Machine for Construction
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Coarse Contractor Thread & Fine Standard Thread
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How To Choose Coarse Thread Or Fine Thread For Bolts-Knowledges
Coarse Thread vs. Fine Thread: Understanding the Differences and
Coarse Contractor Thread & Fine Standard Thread
Threads and thread systems — Rust Magazine
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