Thread: Rules on pre-drilling sizes for screws
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Lew Hodgett Lew Hodgett is offline
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Default Rules on pre-drilling sizes for screws

"Thomas G. Marshall" wrote:

I'm never quite sure what the best practices are for pre-drilling
holes for
screws.

Use a dial caliper (About $20) and measure screw.

Use 75% of thread dia for pilot holes.

Use thread dia +.015 for clearance holes.

Have fun.

Lew



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