'Tenons' in the Bible

Make two dovetails in each board for fitting [them] together; you shall do the same for all the tabernacle boards.

You shall make forty silver sockets under the twenty boards, two sockets under each board for its two dovetails, and two sockets under another board for its two dovetails;

Each board had two tenons (dovetails), fitted to one another; he did this for all the boards of the tabernacle.

and he made under the twenty boards forty silver sockets; two sockets under one board for its two tenons (dovetails), and two sockets under another board for its two tenons.