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Since it comes up so often, attached is a chart for internal threads. Cut taps require different starting hole sizes compared to form taps. Notice that nearly all have a lower and upper range for the drilled hole before tapping. Screw Thread Inserts (STI) are industry standard helicoils...

I wanted to share my experience with installing mini splits for my metal building. Being in the Phoenix area, summers are a trifle warm and winters in the desert can get cold (for a few weeks) so I opted for heat pumps instead of air conditioners. The building was completed in May 2020 and is...

Long time lurker and this is my first thread. I wanted to share my experience with others who might be considering doing this sort of project. Scotty @ Legacy was very helpful and patient with all my newb questions. Steel building is 30' x 50' x 12' completed June 2020 by Sentry Builders in...