'Tenons' in the Bible

There shall be two tenons for each board, fitted to one another; thus you shall do for all the boards of the tabernacle.

You shall make forty sockets of silver under the twenty boards, two sockets under one board for its two tenons and two sockets under another board for its two tenons;

There were two tenons for each board, fitted to one another; thus he did for all the boards of the tabernacle.

and he made forty sockets of silver under the twenty boards; two sockets under one board for its two tenons and two sockets under another board for its two tenons.