Deltana DSBS4 Square Knuckle Hinges, 4" x 4", Solid Brass (Pair)

The DSBS4 is a 4 x 4 inch full mortise hinge with square corners, so it drops into an existing square-cut 4 inch mortise without re-routing the pocket. If your current hinges have rounded corners, the mortise has a radius and a square corner hinge will leave gaps at the corners unless you square them out with a chisel. Check the corner shape on the door and jamb before you order.

No. The DSBS4 square knuckle hinge is a residential plain bearing hinge in solid brass. Plain bearing hinges are for lower-frequency openings, interior and residential doors, not high-traffic commercial entries. For a commercial opening look at a ball bearing or concealed bearing hinge instead, such as the Orca Hardware 4040 Series 4" x 4" square corner commercial hinge or the Don-Jo HWBB84545 heavy weight ball bearing hinge.

The DSBS4 does not have a non-removable pin. On an out-swinging exterior door that matters, because the hinge barrel is on the outside and the pin can be driven out. For an out-swing exterior opening choose an NRP hinge such as the Hager BB1168 non-removable pin full mortise ball bearing hinge. On an in-swing door, where the knuckles sit inside, a standard removable pin is fine and makes it easier to lift the door off for painting or carpet work.

Not without cutting. The DSBS4 measures 4 x 4 inches, so it will not drop into a 3-1/2 inch mortise; you would have to lengthen the pocket in both door and jamb and re-drill. If you are matching existing 3-1/2 inch openings, stay at that size with something like the Emtek 91013 residential plain bearing hinge pair, 3-1/2" x 3-1/2" with square corners, or the Schlage Residential S3P1010 3.5" x 3.5" square corner plain bearing mortise hinges.

The Orca Hardware 4040 Series is a 4" x 4" square corner plain bearing commercial hinge, which matches the DSBS4 on size, square corners, and plain bearing action while being a commercial-duty steel hinge rather than the DSBS4's solid brass residential build. Both mortise into the same 4 inch by 4 inch pocket, so a property manager swapping doors in a corridor can use the Orca in the same prep. The Deltana carries square knuckles for the flush modern barrel look; the Orca is a standard commercial barrel.

The Deltana DSBS4 is cut with square corners, so it will not drop into a radiused mortise without rework. The Orca Hardware 4014 Series is a 4" x 4" x 1/4" radius corner plain bearing commercial hinge and matches that pocket directly. If the radius is the larger 5/8 inch profile common on residential jambs, Delaney's 4" x 4" exterior residential hinges are cut to a 5/8" radius. Confirm the corner radius on the existing hinge leaf before ordering, since the leaf outline is what decides the fit.

The DSBS4 is a plain bearing hinge built for residential service. For an opening carrying a heavy leaf or constant traffic, the Delaney CH401X is a 4" x 4" commercial ball bearing hinge with square corners, so it keeps the same size and corner cut while moving to a bearing knuckle. The Orca Hardware 3535 Series is a 4-1/2" x 4-1/2" square corner ball bearing commercial hinge, which requires the larger 4-1/2 inch mortise. Size the hinge to the existing prep unless the jamb is being cut new.

The DSBS4 leaf is 4" x 4", which will not sit in a 3-1/2 inch pocket. The Emtek 91013 is a residential plain bearing hinge pair, 3-1/2" x 3-1/2" with square corners in plated steel, and the Schlage Residential S3P1010 is a 3.5" x 3.5" square corner plain bearing mortise hinge sold three to a pack. The Emtek 92013 is the heavy duty plain bearing version at the same 3-1/2 inch size for a heavier door in the same prep. Interior doors on 3-1/2 inch prep are also served by Delaney's bulk 3-1/2" x 3-1/2" steel residential hinges, though those are cut to a 5/8" radius rather than square.

The DSBS4 does not carry a non-removable pin. For an out-swinging exterior or secure opening where the pin must not be driven out, the Hager BB1168 NRP is a non-removable pin full mortise ball bearing heavy duty hinge. That is the hinge to specify when the security condition drives the choice; the DSBS4 suits interior and protected openings where pin access is not a concern.

No. The DSBS4 is 4" x 4" and plain bearing, so it neither fills a 4-1/2 inch mortise nor matches heavy weight ball bearing service. The like-for-like replacements at that size are the Don-Jo HWBB74545 and HWBB84545, both heavy weight full mortise ball bearing hinges at 4-1/2" x 4-1/2" in satin chrome, with the HWBB84545 in the 8 series. For a 5 inch by 4-1/2 inch prep the Don-Jo HWBB75045 is steel with a satin chrome finish and the HWBB85045 is brass in satin chrome.

The DSBS4 is sold by the pair, so one order gets you two hinges. Most interior doors take three hinges, which means two pairs per door and a spare leaf. Buying by the pair also lets you match odd counts across a building without ordering full boxes of three.

Screws are covered. The DSBS4 takes a #10 x 1 inch wood screw, which is what ships with the hinge for mounting into a wood door and wood jamb. If you are hanging into a steel frame or a hollow jamb you will need the appropriate machine screws or anchors instead, since the supplied wood screw will not hold.

Seven finishes: Unlacquered Brass, Brushed Brass, Polished Nickel, Brushed Nickel, Polished Chrome, Oil Rubbed Bronze, and Paint Black. Because the hinge is solid brass rather than plated steel, the finish is applied over brass, which is what lets Unlacquered Brass live on a door and patina naturally alongside unlacquered levers and knobs. If you are matching an existing set, pick the finish name your lockset carries rather than eyeballing it.

It is an appearance decision, not a performance one. On the DSBS4 the knuckles are squared off so the barrel reads as a straight edge running down the gap between door and jamb, which lines up with modern square-edge levers and flat trim. A conventional rounded barrel sits proud of that line. Both hang a door the same way. If you want the square look in a heavier decorative hinge, the McKinney SQ3331 square barrel 2-knuckle hinge is 4-1/2 by 4-1/2 inches.

Leaf thickness is .129 inch. That figure decides how deep the mortise has to be cut and how the door sits in the frame: if you are replacing hinges of a different gauge, the door will shift toward or away from the stop by the difference, and heavier gauge hinges will bind unless you deepen the pocket. On a fresh install, set the mortise depth so the leaf sits flush with the door edge.

For plain interior doors, the Delaney RH40xx 4" x 4" residential hinge for Castlegate comes as a 5/8 inch radius by square pair, and the Delaney RH45xx 4" x 4" bulk residential exterior hinge is a 5/8 inch radius pair. In a commercial-duty steel hinge at the same 4 x 4 size, the Orca Hardware 4040 Series is square corner plain bearing. The DSBS4 earns its place where the hinge is visible and the solid brass finish has to match the rest of the trim.

No. The DSBS4 is a plain mechanical hinge with no wire path through the barrel. To carry power to an electrified lock or transfer a door position signal, you need a purpose-built hinge such as the Command Access ETH-CB70 energy transfer hinge, 3 knuckle standard weight, or the Command Access ETM-CB70 energy transfer monitor hinge with door position sensing. Those replace one hinge in the set; the rest of the openings can stay conventional.

Brass is the right choice outdoors from a corrosion standpoint, and the DSBS4 is solid brass through the leaf rather than brass plating over steel, so a scratch does not start a rust line. The limit is duty, not material: it is a residential plain bearing hinge, so it suits a house or a low-traffic unit entry, not an apartment building's common door. For heavier exterior use in a fleet of units, a ball bearing hinge like the Don-Jo HWBB74545 heavy weight full mortise 4-1/2" x 4-1/2" is the tougher option.

The DSBS4 is a solid brass full mortise hinge with no wiring path. Power transfer through the hinge is handled by purpose-built hardware: the Command Access ETH-CB70 is an energy transfer hinge with a 3 knuckle standard weight steel base, and the ETH-BB68 is the 5 knuckle heavy duty version. Where door position also needs monitoring, the Command Access ETM-CB70 adds door position sensing on a 3 knuckle steel base and the ETM-BB68 integrates a door position switch on the heavy duty body. The BEST CECB179-12C is a steel full mortise concealed bearing electrified hinge with a 12-wire quick connect for higher conductor counts.

Several full mortise hinges sit near the DSBS4 by name but serve a different opening. The BEST BB855 is a heavy-duty steel double weight concealed ball bearing prison hinge in the detention hardware line, and the Stanley Security double weight prison hinge is 5" by 6", furnished with no holes and not swaged, meaning it requires drilling and jamb work. The Hager 990 STEEL is a full surface prison hinge with a welded tip that mounts on the face of the door rather than in a mortise. The BEST DAP-3 is a double acting pivot for commercial interior doors, a pivot set rather than a mortise hinge. None of these substitute for a 4" x 4" full mortise plain bearing hinge like the DSBS4.

The DSBS4 is a plain bearing hinge with no closing mechanism. Where the leaf must return on its own without a surface closer, the Stanley Security 2060R is a full mortise spring hinge with square corners at 4.5" x 4.5" on a ferrous steel base. It keeps the square corner cut but needs the larger 4-1/2 inch mortise, so plan the jamb prep accordingly rather than treating it as a same-pocket swap.

The DSBS4 is solid brass throughout, a non-ferrous material, at 4" x 4". Among commercial hinges the McKinney T2314 is a non-ferrous hinge in standard weight with 5 knuckles at medium duty, which is the choice when a commercial-duty non-ferrous body is required. Both avoid the plated steel construction used on hinges such as the Emtek 94013 heavy duty ball bearing pair.

Count matters when ordering. The DSBS4 is sold as a pair, so a three hinge door takes two units plus a spare or a second pair. The Ives 1010RP is a steel plain bearing residential hinge with square corners sold as a set of three, and the Schlage Residential S3P1010 square corner plain bearing mortise hinge comes in a pack of three, which covers a standard three hinge door in one unit. Both are 3-1/2 inch hinges, so they suit a 3-1/2 inch prep rather than the DSBS4's 4 inch mortise.

Delaney's 4" x 4" residential hinges for Castlegate are offered in a 5/8" radius by square configuration and ship as a pair, and the Delaney 4" x 4" bulk exterior residential hinges are a 5/8" radius pair for exterior openings. The DSBS4 is the solid brass square corner, square knuckle option at the same 4" x 4" size, sold as a pair in finishes including oil rubbed bronze, polished nickel, and unlacquered brass. Match on the corner profile of the existing mortise first, then on finish.

Not handed. Like any standard full mortise butt hinge, the DSBS4 has two identical leaves and a removable pin, so the same pair hangs a left-hand or right-hand door. Handing only becomes an order decision on spring hinges, electrified hinges, or anything with a wire exit, where the leaf has to be specified for one side.

The DSBS4 uses a plain bearing, where the knuckles ride directly on one another, and its square knuckles are part of the visible design. The Ives 3CB1 is a 3-knuckle concealed bearing full mortise hinge at medium duty, with the bearing hidden inside the knuckle so the barrel reads as plain; the 3CB1HW is the heavy weight steel version of the same concealed bearing 3 knuckle body. The Hager 920 takes the same idea to a 2 knuckle full mortise concealed plain bearing steel hinge at medium duty. Choose on how the barrel should look and how the door is loaded.