Deltana S35R4 3-1/2" x 3-1/2" x 1/4" Radius Hinge, Residential Thickness, Steel (Pair)

Yes, if your existing mortises are routed with 1/4 inch radius corners. The S35R4 is a 3-1/2 by 3-1/2 inch full mortise hinge with 1/4 inch radius corners, so it drops into a standard router-cut pocket of that size. If your doors have square corner mortises (typically hand-chiseled or older work), you need a square corner hinge instead, not this one.

No. The S35R4 is a residential thickness hinge, .085 gauge steel with a plain bearing, and Deltana lists steel hinges like this for indoor applications. For a commercial opening or a door with a closer, step up to a bearing hinge such as the Orca Hardware 3514 Series 3.5 x 3.5 x 1/4 radius plain bearing commercial hinge, or the Ives 3CB1 3-knuckle concealed bearing full mortise hinge.

Not handed. Full mortise butt hinges like the S35R4 are symmetrical, so the same pair works on a left or right swinging door. What does matter is the pin: these do not have a non-removable pin, so on an outswing exterior door the pin sits on the accessible side. For that situation use an NRP hinge such as the Hager BB1168 NRP full mortise ball bearing hinge.

Corner shape, and that decides whether it drops into your mortise. The S35R4 has 1/4 inch radius corners for router-cut pockets. The Emtek 91013 is a 3-1/2 by 3-1/2 residential plain bearing pair in plated steel with square corners, for chiseled square mortises. Both are plain bearing residential duty at the same leaf size, so the pick is purely about what is already cut in the door and jamb.

Not cleanly. A 1/4 inch radius leaf sitting in a 5/8 inch radius mortise leaves a visible gap at each corner, though it will still screw down. For a true match at the same 3-1/2 by 3-1/2 size, the Delaney RH35 series interior residential steel hinge is a 5/8 inch radius pair. Otherwise re-rout the pocket to 1/4 inch.

The S35R4 is a 3-1/2 inch by 3-1/2 inch plain bearing steel full mortise hinge with 1/4 inch radius corners, sold as a pair for residential use. The closest cross-brand match on corner style and size is the Orca Hardware 3514 Series, a 3.5 inch by 3.5 inch plain bearing hinge with 1/4 inch radius corners, though Orca rates that one medium duty commercial. If you need the same size and bearing type but with square corners instead, the Emtek 91013 is a residential plain bearing hinge pair in 3-1/2 inch by 3-1/2 inch plated steel.

The S35R4 is a residential thickness steel hinge with a plain bearing, sized 3-1/2 inch by 3-1/2 inch. For heavier doors in the same 3-1/2 inch size, Emtek offers the 92013 heavy duty plain bearing pair and the 94013 heavy duty ball bearing pair, both square corner plated steel. On the commercial side, the Ives 3CB1 is a 3-knuckle concealed bearing full mortise hinge rated medium duty, and the 3CB1HW is the heavy weight version of that same concealed bearing hinge.

Not necessarily. Both are 3-1/2 inch by 3-1/2 inch steel residential hinges sold in pairs, but the corner radius differs: the Deltana S35R4 is cut with 1/4 inch radius corners, while the Delaney interior residential hinge is a 5/8 inch radius. A 5/8 inch radius leaf will leave a visible gap at the corners of a mortise routed for 1/4 inch radius, and a 1/4 inch leaf will not fill a 5/8 inch pocket. Check the existing mortise corners first. For a true 1/4 inch radius match, the Orca Hardware 3514 Series is a 3.5 inch by 3.5 inch plain bearing hinge with 1/4 inch radius corners.

The S35R4 is sold by the pair, two hinges. A standard 6'8" interior passage door normally takes three hinges, so plan on two pairs per door and a spare leaf, or order in even quantities across a job. Note it is packed bulk in case quantities only.

Yes, the pair ships with #9 x 3/4 inch wood screws, which suits a solid or hollow core wood door and a wood jamb. If you are hanging into a steel frame or need a longer screw to reach the stud behind the jamb, source those separately.

Ten finishes: Oil Rubbed Bronze, Polished Nickel, Brushed Nickel, Antique Nickel, Paint Black, Polished Chrome, Brushed Chrome, Polished Brass, Brushed Brass and Antique Brass. That spread covers the usual property-management standardization targets, so a whole building of interior doors can be brought to one look with a single model number.

Plain bearing means the knuckles ride directly on each other with no ball or concealed bearing race between them. That is fine for interior passage, closet and bedroom doors that see light cycling. On a high-traffic opening, a door with a closer, or anything heavy, the knuckles wear and can start to bind or squeak. For those, move to a bearing hinge like the Ives 3CB1HW heavy weight concealed bearing full mortise hinge or the Emtek 94013 heavy duty ball bearing pair.

The S35R4 uses an arc hole pattern, meaning the screw holes are staggered on a curve rather than in a straight line down the leaf. If your old hinge had the same arc layout at 3-1/2 by 3-1/2, the holes will land close. Coming off a straight-line pattern, expect to plug and re-drill at least some of the jamb holes.

The S35R4 is fixed at 3-1/2 inch by 3-1/2 inch with 1/4 inch radius corners. To keep the same radius corner and plain bearing arrangement in a 4 inch leaf, the Orca Hardware 4014 Series is a 4 inch by 4 inch plain bearing hinge with 1/4 inch radius corners. If your 4 inch mortise is square cut, the Orca 4040 Series is a 4 inch by 4 inch square corner plain bearing hinge. Delaney also lists 4 inch by 4 inch residential pairs with a 5/8 inch radius, so confirm your corner radius before ordering those.

Several full mortise steel hinges are built for jobs the S35R4 is not intended for. The BEST BB855 and Stanley BB855 are double weight prison hinges, the Stanley version measuring 5 inch by 6 inch and furnished with no holes and not swaged. The Hager 990 STEEL is a full surface prison hinge with a welded tip. Electrified options such as the BEST CECB179-12C with 12-wire quick connect and the Command Access ETH-CB70 energy transfer hinge carry power through the hinge for access control. The S35R4 is a plain bearing residential full mortise hinge with no wiring and a standard removable pin, so none of those are like-for-like swaps.

No. The Deltana S35R4 is supplied with a standard removable pin and is not a non-removable pin hinge, so on an outswing door the pin is accessible from the exterior. For an NRP hinge, the Hager BB1168-NRP is a full mortise ball bearing hinge with a non-removable pin, rated heavy duty. That is a different weight class than the residential thickness S35R4, so confirm your mortise depth and door weight before switching.

No. The S35R4 is a plain bearing full mortise hinge with no closing mechanism. Where the opening needs the door to self-close, the Stanley Security 2060R is a full mortise spring hinge, square corner, 4.5 inch by 4.5 inch on a ferrous steel base and rated heavy duty. That is a larger leaf and a square corner, so the mortise will need to match.

The Deltana S35R4 is a steel hinge described as a value choice for indoor applications, so it is not the pick for a wet or salt-air location. The McKinney T2314 is a non-ferrous hinge in standard weight with 5 knuckles, rated medium duty, which avoids the ferrous base entirely. Confirm the leaf size and corner prep against your frame, since the S35R4 is 3-1/2 inch by 3-1/2 inch with 1/4 inch radius corners.

Steel, both the base material and the substrate, with the finish applied over it. If you need solid non-ferrous material for a coastal or corrosive interior environment, a steel hinge is the wrong call regardless of the finish name on it. A non-ferrous option in the same category is the McKinney T2314 standard weight 5-knuckle hinge.