The Hillman Group 230086 Zinc Hex Lag Screw, 3/8" x 2-1/2", 50 Pieces
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Questions & Answers
Tuesday, September 16
The way people approach this is different, but I have to think about the material you're dealing with in order to answer this question A 1/4" bit may be too soft or too hard. I recommend testing the hardness of the bit by using a 1/4" bit. The screw should be able to grip the wood well if it is soft, like pine. You may need to go up to a 5/16th hole, if it starts to harden, as it would into oak. It is my hope that this will be helpful.
Yes, but make sure you prepare ahead of time During drilling. They would probably not be strong enough to hold a stud, since they are thick enough to split it.