'Tenons' in the Bible

Make two tenons in each board for dovetailing and fitting together; so shall you do for all the tabernacle boards.

And you shall make forty silver sockets under the twenty boards, two sockets under each board for its two tenons.

Each board had two tenons (projections) to fit into a mortise to form a clutch; he did this for all the boards of the tabernacle.

And he made under the twenty boards forty sockets or bases of silver, two sockets under one board for its two tenons or hands, and two sockets under another board for its two tenons.