Orca Hardware 4" x 4" x Square Corner Spring Hinge

The Orca 4040 spring hinge is a 4 x 4 inch hinge with square corners, so it drops into an existing 4 inch square-corner mortise on both leaves. If the door and jamb are prepped with radiused corners instead, this one won't seat cleanly without recutting; you'd want a radius corner spring hinge like the Hager 1251 with 1/4 inch round corners or the Hager 1252 with 5/8 inch round corners.

When the specification calls for a UL listed spring hinge, the Design Hardware UL spring hinge is a medium duty option, and the Emtek 95013 is a UL listed plated steel spring hinge sold as a pair at 3-1/2 by 3-1/2 inches with square corners. For a fire rated closer application, the SOSS 216IC and 220IC invisible spring closer hinges carry a 20 minute fire rating and are heavy duty. The Orca 4040 is a residential application, standard duty rating spring hinge.

No. The Orca 4040 is a single direction 4 inch by 4 inch square corner spring hinge. For a door that swings both ways, the Deltana DASHS is a double action saloon hinge sold each in 4 inch, 5 inch, and 6 inch heights, and the Deltana DASH95 is a double action spring hinge with solid brass cover plates. Both are built for two way swing; the Orca 4040 is not a substitute for either.

The Orca 4040 spring hinge is a 4 inch by 4 inch square corner hinge in steel at a medium duty level. When the opening needs a wider leaf, the McKinney 1502 is a square corner full mortise spring hinge at 4-1/2 by 4-1/2 inches, also medium duty. Both are square corner spring hinges, so the mortise prep style carries over; the difference is leaf size, which has to match the existing cutout on a retrofit.

The Orca 4040 is cut with square corners, so it will not drop into a radius corner pocket without rework. For radius prep, the Hager 1251 is a full mortise spring hinge with 1/4 inch round corners and the Hager 1252 is the same hinge with 5/8 inch round corners, both standard weight steel at a medium duty level; the Deltana DSH35R4 is a single action spring hinge at 3-1/2 by 3-1/2 inches with a 1/4 inch radius in steel. Match the corner radius to what is already routed in the frame.

Two spring hinges carry the closing action on a standard 84 inch door, and the Orca 4040 is sized for that height. Common practice is three hinges total per leaf on an 84 inch door, so the usual arrangement is two spring hinges plus one standard butt hinge in the middle position. Each Orca 4040 ships as a single hinge in one finish, so order the count you need.

A spring hinge closes the door from the hinge itself, with nothing mounted on the door face or the frame, which is why property managers use them on unit interior doors, closets, and light utility doors. The Orca 4040 is medium duty steel and self-closing. It gives you closing action, not controlled closing: there is no sweep speed, latch speed, or backcheck adjustment the way a surface closer has. If the door needs controlled swing or accessible opening force, use a closer, since the 4040 is not ADA compliant.

The Orca 4040 is a medium duty, standard duty rated steel hinge, sized at 4 x 4 inches. That's the range for residential-weight and light commercial doors, hollow core and typical solid core interior leaves. For a heavier or higher traffic leaf, step up to a 4-1/2 inch hinge like the McKinney 1502 square corner full mortise spring hinge, or to a heavy duty unit such as the SOSS 218IC.

Not with the Orca 4040. If you need to pull leaves for painting or turnover work without backing out screws, a removable pin spring hinge is the answer: the BEST 2060R plain bearing spring hinge with removable pin in square corners, or the BEST RD2060R with a radius corner. Both are medium duty standard weight, same class of hinge as the 4040.

Steel is the substrate on the 4040, at a medium duty, standard duty rating. That's fine for interior openings in a dwelling unit or a light commercial space. For a damp or corrosive location where steel will rust through the plating, a stainless option is the better call, such as the Hager 1150 full mortise spring hinge in stainless steel.

The Orca 4040 is a 4 inch by 4 inch square corner steel spring hinge. On a narrower or lighter door, the Emtek 95013 is a 3-1/2 by 3-1/2 inch square corner spring hinge in plated steel, UL listed and sold as a pair, which keeps the square corner prep at a smaller leaf. The Deltana DSH35R4 and DSH35R4-A are 3-1/2 by 3-1/2 inch single action steel spring hinges with a 1/4 inch radius corner, for frames routed with a radius rather than square.

The Pemko Markar FM400 and FM900 series and the Pemko FS402 and FS902 series are spring loaded continuous hinges built for toilet partitions with an 80 pound load capacity, the FS902 in 304 stainless steel. They are spring loaded, but they are continuous hinges for partition doors rather than a full mortise butt hinge, so they do not drop into the 4 inch by 4 inch square corner mortise the Orca 4040 uses. The SOSS 216IC, 218IC, and 220IC are invisible spring closer hinges, a concealed heavy duty design with the 218IC requiring a 1-3/4 inch minimum door thickness and the 220IC a 2 inch minimum, which is a different prep entirely.

The Orca 4040 spring hinge carries a medium duty level. Where the door demands more, the SOSS 216IC, 218IC, and 220IC invisible spring closer hinges are heavy duty spring hinges, with the 218IC at 7 inches for a 1-3/4 inch minimum door thickness and the 220IC at 7 inches for a 2 inch minimum thickness. These are concealed closer hinges rather than surface butt hinges, so confirm the door and frame can take the concealed prep before specifying.

Three finishes on the 4040 spring hinge: Satin Nickel, Matte Black, and Oil-Rubbed Bronze. That covers matching to modern black or traditional bronze lever sets on residential-style openings. If you're standardizing across a building, order all the openings in one finish at once, since square corner 4 x 4 hinges from different makers will not necessarily match tone.

No. Spring hinges like the Orca 4040 are tensioned in place with a tension pin through the hinge barrel, so the door stays hung while you wind the spring. Orca publishes installation instructions and recommendations for the spring hinge covering that adjustment procedure.

Each Orca 4040 is ordered as a single hinge, picked by finish: Satin Nickel, Matte Black, or Oil-Rubbed Bronze. Count your openings and multiply. If you'd rather buy by the pair, the Emtek 95013 spring hinges are sold as a pair, though at 3-1/2 x 3-1/2 inches rather than 4 x 4.