Counterborescrew

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Counterboredrawing

Counterborehole dimensions

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Serving machine shops and job shops alike, Travers is your metalworking and industrial supply superstore with over 500,000 tools from more than 800 trusted brands, including a large Made-in-USA product offering.

When the cannon is loaded, a small quantity of powder is placed in the counterbore, and the spark between C and E ignites this and discharges the cannon.