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I need help converting a metric drill bit to a standard one!!!?

The plans call for me to drill a 3.5mm hole. I only have standard drill bits, so can someone please help me convert this.

10 Answers

The inch equivalent of 3.5mm is 0.13779 (3.5/25.4), so 1/8 is smaller, 9/64 is bigger, #29 is smaller, #28 is bigger (but here we are talking about 2 or 3 thousands of an inch). There is a great chart at http://en.wikipedia.org/wiki/Drill_and_tap_size_ch… , it shows all types of designations in order.... Show More
This Site Might Help You. RE:I need help converting a metric drill bit to a standard one!!!?The plans call for me to drill a 3.5mm hole. I only have standard drill bits, so can someone please help me convert this.... Show More
It comes out between a #28 and #29 bit. If all you have are fractional bits then it is a couple thousandths smaller than a 9/64″... Show More
At the hardware store they will sell a small metal or plastic template with holes in it. Get one with Standard and metric equivalents.... Show More
You can simply take the metric number (3.5 mm) and divide it by 25.4 to get the decimal equivalent of .138″. Conversely, just multiply any decimal number times 25.4 to get the metric equivalent.... Show More
3.5 mm = .138″ About the only size fraction drill that comes close is 1/8″ which of course is .125″. Good LuckAnd if you can find one a 9/16 is .141″... Show More
1 Inch is 25.4 mm, so you want about 1/4 inch or 3/8... Show More
http://en.wikipedia.org/wiki/Drill_bit_sizes ——down at the bottom of the page is a conversion chart. happy drilling.... Show More

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