draw-bore tenon

A tenon in which the pinhole does not align with that in the cheeks or sides of the mortise, but is kept nearer the inside of the mortised beam so that when the pin is driven it has to drag the shoulders of the tenon close against the mortised beam or post. This is apt to cause difficulty in the proper taking down of old work which is to be set up again, as the oak pins may be found so bent that they cannot be “drifted,” or driven out. (Isham, 1928)