Bi-fold closet doors usually fail at the middle. The two panels hang off a pair of small hinges, and when those hinges wear, bend or pull their screws, the doors start to sag, scrape the floor and refuse to fold flat.
The Prime-Line N 7025 is the standard replacement for that job. It is the non-mortise hinge pattern that most wood bi-fold door manufacturers fit at the factory, sold as a single pair with the fasteners in the pack.
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The short answer
The factory-pattern replacement hinge for wood bi-fold closet doors: stamped steel, brass plated, surface-mounts with a screwdriver, fasteners included. Amazon rating: 4.4/5 from 156 reviews.
What these hinges are
Each pack holds two hinges in a flag layout: one leaf extends to the left, the other to the right. That shape lets the two door panels fold flat against each other while the leaves sit on the panel edges.
They are non-mortise hinges, which is the whole point. There is no recess to cut and no chisel work — the leaves surface-mount onto the door, so a swap is a screwdriver job that reuses the existing screw pattern on most doors.
The construction is stamped steel with a brass-plated finish. That makes them light-duty hardware in the best sense: exactly matched to the hollow and light solid wood panels that bi-fold closet doors are made from.
Specs
| Type | Bi-fold door hinge, flag design (one leaf extends left, one right) |
| Mounting | Non-mortise — surface mounts, no chiselling |
| Material | Stamped steel |
| Finish | Brass plated |
| Size | 3 in. long × 1.31 in. wide |
| Pack | 1 pair (2 hinges), fasteners included |
| Fits | Most wood bi-fold closet doors |
| Warranty | 1 year against manufacturing defects (manufacturer) |
Before ordering, compare the 3 in. × 1.31 in. size and the screw-hole pattern against the hinge you are taking off. Bi-fold hardware is mostly standardised, but “mostly” is doing some work in that sentence, and Prime-Line’s own retail listings give the same advice.
Pros and cons
Pros
- Non-mortise design — surface-mounts with a screwdriver, no chisel work or recess cutting
- The factory hinge pattern most wood bi-fold doors were built with, so the screw holes usually line up
- Fasteners included in the pack
- Stamped steel with a brass-plated finish, sized for light closet and laundry bi-folds
Cons
- Light-duty only — not sized or rated for a full-size swinging passage door
- One pair per pack, so a two-pair doorway needs two packs
- This listing is the brass-plated finish, which won’t match nickel or black hardware
Who they’re for — and who should skip them
These fit the classic repair: a wood bi-fold closet or laundry door whose centre hinges are worn, bent or mismatched after a previous fix. If your doors were built with surface-mount hinges, this is the like-for-like part.
Skip them for full-size passage doors — these are not mortised butt hinges and are not sized or rated for a heavy swinging door. Also skip them if your bi-fold panels use pivot-only hardware with no centre hinges at all; some track systems work that way. If you are choosing doors from scratch, our guide to bi-fold doors covers the main styles and hardware types.
Fitting them
- Lay the folded door pair flat, or prop them in place with the fold open. Remove one old hinge at a time so the panels stay aligned, and offer the new hinge up to the same holes.
- Drive the included fasteners snugly, then fold and unfold the doors a few times to check the panels meet evenly.
- Rehang the doors on their track pivots. If a door still binds after the hinge swap, the fault is usually in the track guides or pivot brackets rather than the centre hinges.
Other options worth a look
If your doors are mobile-home or RV interior doors, the Three Leaf Non-Mortised Hinge (Amazon rating: 4.5/5) is the surface-mount pattern made for those thinner panels.
For pivot-style bi-fold and hidden door setups, the TamBee Pivot Hinge (Amazon rating: 4.5/5) replaces the track pivot hardware instead of the centre hinge — a different part for a different failure.
Frequently asked questions
Do I need to cut a mortise?
No. These are non-mortise hinges; the leaves surface-mount onto the door panels.
How many hinges come in a pack?
One pair — two hinges, one left-flag and one right-flag — with fasteners included.
Are screws included?
Yes. Retail listings for the N 7025 consistently list fasteners in the pack.
Will they fit my bi-fold doors?
They are made for most wood bi-fold doors. Check the 3 in. × 1.31 in. size and hole spacing against your old hinge before ordering.
The bottom line
For a worn pair of bi-fold doors, this is about as straightforward as hardware gets: a matched pair of the factory-pattern hinges, no cutting, and the screws in the box. The N 7025 does that one job properly.
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