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Step 4 Tee nuts

The nuts that receive the 1/4 inch screws are Tee nuts. They can be recessed so the surface remains flush and on the same plane. This keeps them out of the way of several things. That will be very necessary on the rear support for the angle iron rails. The Tee nuts will be buried below the support, but above the surface of the table. This is so the rails can be anchored to the rear support, but the rear support still has a little lateral movement to assure a square cut.