Hager, 1741, 3-1/2 in. x 3-1/2 in. Full Mortise, Rounded Corners, 5-Knuckle, Plain Bearing Door Hinges with fasteners. ANSI A8134- Full Mortise Hinges have one leaf mortised in the door edge and the other leaf mortised in the jamb. This is the most common hinge application. Five Knuckle with Button Tips. Non-Template Hole Pattern. Supplied with Removable Pin (SRP) as standard. Specify SRP or NRP when applicable. Non-Removable pin prevents the hinge pin from being removed when the door is closed. A threaded set screw located in the barrel is tightened down into a groove in the hinge pin.