Hopefully the question is clear. The threaded insert would be about a 1/2" long, and the lumber would be 8/4. The insert would be for a leg or a headboard bracket. If it would compromise strength, I have alternatives, but this would be the most aesthetic.

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    You'll need to be a little more descriptive of the joint (photos always help). If it's using a biscuit or not isn't nearly as important as the grain direction. Is it a long-grain to long-grain joint? A miter joint? A butt joint? – SaSSafraS1232 Jan 13 '18 at 0:10
  • Did you use biscuit joinery and glue to join the 8/4 boards together for the table top, and are now looking at having a mechanical means of attaching the legs? – LeeG Jan 13 '18 at 3:44
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    Biscuits actually already compromise strength in long-grain butt joints FYI. But if the board edges are jointed properly, glued well and sufficient clamp pressure is applied during assembly this shouldn't be anything to worry about. – Graphus Jan 13 '18 at 6:57
  • I don't think it's really fair to say that biscuits compromise a joint's strength. They certainly don't increase strength, but in a typical long-grain joint (i.e. a panel glue-up) they won't noticeably decrease it either. – SaSSafraS1232 Jan 16 '18 at 21:26

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