Abstract: An spring hinge construction comprising a pair of hinge leaves having hollow knuckle portions axially aligned to form a hinge barrel containing a torsion spring. A pintle in each end of the barrel operatively engages an adjacent end of the spring to fix it against relative rotation. One pintle is fixed, through a leaf knuckle, to one hinge leaf, and the other pintle is rotationally adjustable to set a desired torsion on the spring, after which it is fixed against counter-rotation by means of a loose pin which is inserted through an elongate slot in a knuckle of the other leaf and into a selected radial passageway opening in the pintle which aligns with the end of the slot.