Lockable hinge

A lockable hinge for pivotally interconnecting a door with a door frame, said hinge comprising:

• a first hinge plate having a base for mounting on the door and a plurality of integral first annular members extending in a spaced axial series, first apertures having a first non-circular cross section extending through said first annular members along a first common axis;
• a second hinge plate having a base for mounting on the door frame and a plurality of integral second annular members extending in a spaced axial series, second apertures having a second non-circular cross section similar to that of said first non-circular cross section extending through said second annular members along a second common axis, said annular members interfitting and coaxially aligning said first common axis with said second common axis wherein said non-circular cross sections in said annular members are defined by an axially extending compound surface peripherally circumscribed by a square section and a coaxially aligned circular section of greater diameter than the width of said square;
• an elongated hinge pin assembly, said hinge pin assembly including a first pin member and a second pin member, said first having a square cross section slidably received in said first and second apertures and preventing relative pivotal movement between said hinge plates and said second pin member has a circular cross section slidably inserted with respect to said circular sections and journaled for permitting pivotal movement between the door and the frame.