Hager 1279 4-1/2" x 4-1/2" Plain Bearing, 5 Knuckle, Steel Hinge

The Hager 1279 is a full mortise, five-knuckle, plain bearing steel hinge in the 4-1/2" x 4-1/2" size, a standard-weight commercial hinge for medium-weight doors and lower-frequency openings. A plain bearing hinge carries the door on the knuckle joints themselves rather than on ball bearings, which makes it the economical choice for doors that don't see constant, high-traffic use, interior offices, closets, utility rooms, and similar openings. It's all steel with a steel pin, certified to ANSI A8133, and available in a wide range of architectural finishes, a dependable, value-priced workhorse hinge.

Plain bearing and where the 1279 fits

This is the key thing to understand when choosing the 1279, because the bearing type is what determines the right application. A plain bearing hinge has no ball bearings between the knuckles; the knuckles bear directly on each other. That's perfectly suited to medium-weight doors or doors requiring low-frequency service, where the cycle count is modest and ball bearings aren't needed. For high-frequency, high-traffic, or heavy doors, Hager's ball bearing hinges (the BB-prefix models) are the better fit, but for the many everyday commercial doors that open and close at a normal pace, the plain bearing 1279 does the job reliably and economically.

The 1279 is full mortise, meaning both leaves mortise into the door edge and the frame, the standard mounting for commercial hollow metal and wood door openings. It's a five-knuckle hinge, the common commercial configuration.

Built to commercial standard, easy to service

The 1279 is all steel with a steel pin, built to ANSI A8133, with a 0.134 gauge that gives it solid standard-weight strength. The pin is a non-rising removable pin with a button tip and plug, which matters for service: the pin doesn't work its way up over time, and it can be removed when you need to take the door down, while the button tip and plug give it a finished look top and bottom. Each hinge has 8 holes and comes with the mounting screws (wood screws plus machine screws, with the exact screw package depending on finish).

It's offered in an unusually broad finish range, from prime coat and satin chrome to oil rubbed bronze, satin nickel, bright brass, antique bronze, mechanical galvanized, and more, so you can match the 1279 to virtually any door hardware finish in the building. It's sold as individual units (1 each).

Hager 1279 (4-1/2" x 4-1/2") specifications

• Type: Full mortise, five knuckle, plain bearing hinge. Standard weight.

• Application: Medium-weight doors or doors requiring low-frequency service.

• Size: 4-1/2" x 4-1/2" (114 x 114 mm).

• Material: Steel with steel pin. ANSI A8133.

• Pin: Non-rising removable pin with button tip and plug.

• Gauge: 0.134.

• Holes: 8. Screws: wood screws plus machine screws included (package varies by finish).

• Finishes: USP prime coat, US3, US4, US5, US10, US10A, US10B, US10D, US15, US15A, US26, US26D, H2H mechanical galvanized, LS Luma Sheen.

• Packaging: Sold individually (1 each).

• Model: 1279 (SKU 12794545).

Why choose the Hager 1279

Hager is one of the most established hinge manufacturers in commercial hardware, and the 1279 is its dependable standard-weight plain bearing hinge. You get full mortise commercial construction, a serviceable non-rising removable pin, ANSI A8133 certification, a huge finish selection to match any opening, and all at a value price that makes sense when you're hanging a lot of medium-traffic doors. For interior commercial doors that don't need ball bearings, the 1279 is the practical, economical choice, and it comes in 3-1/2", 4", 4-1/2", and 5" sizes plus NRP (non-removable pin) and round-corner versions so you can match the exact opening.

One thing to confirm before ordering: the 1279 is a plain bearing, standard-weight hinge for medium-weight, lower-frequency doors. If your door is heavy or high-traffic, choose a Hager ball bearing hinge instead. For exterior or out-swinging doors where security matters, consider the NRP (non-removable pin) version so the pin can't be pulled. Verify your door size and weight, and pick the finish to match your hardware.

Order the Hager 1279 from American Locksets

We stock the full Hager hinge line from authorized distribution, so every hinge ships with the manufacturer warranty. Compare sizes and types in the Hager 5 knuckle plain bearing category, see all five knuckle plain bearing hinges, or browse all door hinges.