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Old 03-17-2003, 09:09 PM   #1
Join Date: Mar 2003
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Drill Bit Conversion Chart

Airstream is always talking about a #30 drill bit.
What size is that in good old English fractions?

Any idea of where there might be a chart found for drill bit #s vs. inches?

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Old 03-17-2003, 09:25 PM   #2
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The conversion for drill bits to rivets are:
The "numbered" drill bits are available at ACE and better hardware stores.

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Old 03-17-2003, 09:33 PM   #3
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Drill Bit Number 30 is a standard size.

#30 = 0.1285 inches = 03.2639 mm

Therefore, 0.1285 is between 1/8" and 9/64", but closer to 1/8"

for other sizes, visit:

double-check at:

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