What size/type screws should I use to mount a Raco electrical box bar hanger (Model #920) to studs?
Electrical – What Size Screws Should I Use to Mount an Electrical Box Bar Hanger
electrical
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Best Answer
The screw should not be larger than the factory drilled hole which looks to be 1/4". Typically seen in the field are #10 x 1" Slotted Hex Washer Head Sheet Metal Screw.
You can go longer than 1" but for that bar hanger probably not necessary.