Deltana OK3025B Olive Knuckle 3" x 2-1/2" Hinge, Solid Brass (Each)

Yes, handing is part of the order. The OK3025B is sold as a left hand or a right hand hinge, and the two are not interchangeable, so determine the door's swing before you order. It also ships each, not by the pair, so a door taking three hinges needs three of the same hand.

The ABH 019OK olive knuckle hinge is a stainless steel commercial door hinge, where the Deltana OK3025B is solid brass and specified for residential use. If the opening is a commercial door in a wet, coastal, or high-traffic corridor where a stainless base metal is preferred, the ABH 019OK covers that in the same olive knuckle style; the OK3025B is the brass option, offered in finishes including polished brass, unlacquered brass, oil rubbed bronze, polished nickel, and polished chrome, in a 3 inch by 2-1/2 inch size.

They are both olive knuckle hinges in brass, but they mount differently. The BEST BB95 is a forged brass full surface olive knuckle hinge, meaning both leaves apply to the face of the door and frame. The Deltana OK3025B is a 3 inch by 2-1/2 inch solid brass olive knuckle hinge supplied in left hand and right hand, with #10 x 1 inch wood screws. Confirm the existing prep on the opening before swapping: a full surface hinge and a mortised leaf are not interchangeable without changing the door prep.

An olive knuckle is a paumelle-style hinge with a single rounded barrel where the two leaves meet, so the exposed edge reads as one smooth olive shape instead of the stacked knuckles of a butt hinge. It is chosen where the hinge is meant to be seen, on cabinets and interior doors, and because the leaves lift apart it lets you set the door on and off without pulling a pin. The Deltana OK3025B is the 3 x 2-1/2 inch solid brass version, sold by hand and by the piece.

Plain bearing is what the OK3025B uses, which suits light doors and cabinet doors where cycle counts are low. Heavier or high-frequency doors are where you want a ball bearing or a commercial hinge; a plain bearing hinge on a heavy slab wears at the knuckle and starts to bind. Match the 3 x 2-1/2 inch leaf to the weight it was meant for.

The BEST BB95 olive knuckle hinge is the one described with a removable pin. The Deltana OK3025B is a non-NRP hinge, so it does not carry a non-removable pin feature, and it is handed left or right rather than reversible in place. If pin removal is how you plan to service or rehang the door, the BB95 is the peer built around that; if the decorative brass finish range matters more, the OK3025B is the 3 inch by 2-1/2 inch solid brass option.

The BEST BB95 olive knuckle hinge is rated medium duty and is a forged brass full surface hinge, which suits a heavier leaf than the Deltana OK3025B, a plain bearing solid brass hinge specified for residential applications. For interior residential doors and cabinets in a decorative brass finish, the OK3025B is the fit; where the door weight or cycle rate is closer to commercial service, look at the medium duty BB95 or the stainless ABH 019OK.

One unit is one hinge, not a pair, so a door hung on three hinges needs three pieces, all in the same hand and finish. Budget the fasteners accordingly too, since each hinge ships with #10 x 1 inch wood screws.

Solid brass, both material and substrate, with the finish applied over it. That is why it holds up on unlacquered and antique treatments that develop a patina rather than flaking off a plated shell.