Deltana OK5032B Olive Knuckle 5" x 3-1/4" Hinge, Solid Brass (Each)

Handing matters on this one. The OK5032B is sold handed, left hand or right hand, so you have to know which way the door swings before you order. An olive knuckle leaf is not symmetrical the way a standard butt hinge is, and a left hand hinge will not mount on a right hand door. Stand on the side the door swings away from you: hinges on the left is left hand, hinges on the right is right hand. Every finish is offered in both hands, so the hand choice never limits your finish choice.

Leaf size is 5 x 3-1/4 inches, which is a full-size door hinge rather than a cabinet-only part. Deltana lists the olive knuckle line for doors and cabinets both. The limit is the fastening: it takes #12 x 1-1/4 inch wood screws, so the jamb and stile need enough solid wood to take a 1-1/4 inch screw without blowing through. It is a plain bearing hinge rated residential, so use it on interior and residential entry doors, not on a heavy commercial opening in constant traffic.

Not the best fit. The OK5032B is solid brass on a plain bearing and Deltana rates it residential, which means light to moderate cycles. For a commercial opening, ZenSupply carries the ABH 019OK Series olive knuckle in stainless steel, built as a commercial door hinge, and the BEST BB95 forged brass full surface olive knuckle, which is a medium duty hinge with a removable pin. The BB95 is full surface, so it mounts to the face of the door and frame rather than being mortised in, which is worth knowing before you cut anything.

No, the OK5032B is not an NRP hinge. On an out-swing door the barrel sits on the outside, so a plain hinge can be attacked at the pin. If security on an out-swing opening is the concern, this is not the hinge for it, and the plain brass construction with no NRP feature is why. For interior doors and cabinets, where the barrel is on the protected side, it is a non-issue.

The BEST BB95 is a forged brass olive knuckle hinge rated medium duty, which is the step up when a door sees more cycles than a residential entry or interior door. The Deltana OK5032B is a plain bearing hinge in solid brass carrying a residential designation. Both keep the olive knuckle profile, so an office suite door, a clubhouse door, or a heavily used common area door in an apartment building is where the BB95 duty level comes into play.

No - the BEST BB95 is a full surface olive knuckle hinge, meaning both leaves mount to the face of the door and the face of the frame rather than into a routed mortise. The Deltana OK5032B is a 5 inch by 3-1/4 inch olive knuckle hinge sized to the leaf dimensions of the door and jamb prep. If the existing openings are already mortised for a 5 x 3-1/4 leaf, the BB95 is not a drop-in replacement; it is the choice when you are surface applying to a door you do not want to rout, such as a metal-faced or previously butchered jamb.

An olive knuckle hinge shows a single rounded barrel between the two leaves instead of a stack of knuckles, and it lets a door swing open and clear with a simple mount. Pick it where the barrel is visible and the look matters, or where you want the door to mount easily on the jamb. A standard butt hinge is the better call on a plain painted opening where nobody sees the barrel and you want the widest range of sizes and duty ratings. The Deltana OK5032B is solid brass and rated residential, so on a busy commercial door a heavier steel or stainless option is the safer pick.

Twelve finishes: polished brass, PVD polished brass, unlacquered brass, antique brass, polished nickel, brushed nickel, antique nickel, polished chrome, brushed chrome, oil rubbed bronze, and paint black. All twelve are offered in both hands. If the door sees weather or coastal air, the PVD polished brass is the one to specify, since PVD is a hard vapor-deposited coating rather than a lacquer. Unlacquered brass is the opposite choice on purpose: it is bare brass and will patina and darken over time, which is what people want when they are matching an aged look.

Match on three things and it will. First the leaf size, 5 x 3-1/4 inches, which has to equal what is already mortised into the jamb or you will be recutting. Second the hand, since these are ordered left or right. Third the finish, from the twelve Deltana offers. If your existing hinges are a different leaf size, the mortise will not line up and the OK5032B is the wrong part for that opening regardless of finish.

The BEST BB95 is specified with a removable pin, so the door leaf can be lifted off the frame without unscrewing the hinge leaves. The Deltana OK5032B is not a non-removable-pin hinge and comes handed left or right rather than reversible. For a maintenance crew that pulls doors regularly to move furniture or service a unit, the removable pin on the BB95 is the functional difference to weigh.

The Deltana OK5032B is the finish-driven option in the olive knuckle style, offered in Polished Brass, PVD Polished Brass, Unlacquered Brass, Antique Brass, Polished Nickel, Brushed Nickel, Antique Nickel, Polished Chrome, Brushed Chrome, Oil Rubbed Bronze, and Paint Black, all over a solid brass hinge. The ABH 019OK is a stainless steel commercial hinge and the BEST BB95 is forged brass, so where the specification is driven by matching existing levers, knobs, and door trim across a residence, the OK5032B is the one with the finish range behind it.

Fasteners for the OK5032B are #12 x 1-1/4 inch wood screws, and there is no machine screw variant of this hinge. That tells you two things before you order: the hinge is meant for wood substrate, and if you are hanging on a hollow metal frame you need a machine-screw hinge instead. Order screws to match the finish you pick so the heads do not stand out against the brass or bronze.

Solid brass, both the material and the substrate, so the finishes are applied over brass rather than over plated steel. That matters for two reasons: brass will not rust the way a plated steel hinge does once the coating wears, and unlacquered brass can be left to patina because the color goes through the base metal. It is a plain bearing hinge, so there is no ball bearing race in the barrel.

Yes, Deltana lists the olive knuckle hinges for cabinets as well as doors. At 5 x 3-1/4 inches the leaf is on the large side for a cabinet, so it suits tall pantry or armoire doors and full-height casework rather than a small upper box. Check that the cabinet stile is wide enough to take a 3-1/4 inch overall hinge width and that the material is thick enough for a #12 x 1-1/4 inch wood screw.