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econdave 10-10-2007 06:10 AM

what size drill bit?
I need to drill and tap a hole, the bolt size is 7/16, what size drill bit would I use to do this?

RippySkippy 10-10-2007 06:45 AM

with 7/16-14 use 23/64
with 7/16-20 use 25/64

joed 10-10-2007 06:16 PM

Here is a tap drill chart that will size any hole you need to tap.

RippySkippy 10-11-2007 05:23 AM

Nice site joed, you have compiles a lot of useful information there. I do have one question...on the Electrolytic Rust Removal page there's a reference sodium carbonate, i.e. washing soda. Is there a common off the shelf name for that product? If not where does one acquire it?

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