Changing door knobs and locks requires more than removing old hardware. For apartments, hotels, offices and commercial interiors, the new set must match door thickness, latch backset, bore size, lock function, screw position and finish style. Poor matching can cause loose knobs, misaligned latches, stiff turning or visible gaps after installation.
HANGFAT focuses on stainless steel architectural hardware, including door knobs, Lever Handles, Hinges, locksets, back plates and bathroom accessories. We support matched hardware supply for renovation projects, bulk replacement orders and interior door hardware upgrades.
| Check Item | Why It Matters |
|---|---|
| Door thickness | Ensures the knob and lock fit correctly |
| Bore hole size | Avoids extra cutting or unstable fixing |
| Latch backset | Matches the distance from edge to knob center |
| Lock function | Fits privacy, passage or entrance use |
| Finish color | Keeps interior hardware consistent |
Many interior doors commonly use 60 mm or 70 mm latch backset, but project buyers should confirm the local standard before ordering. EN 1906 is widely used for lever handle performance, including durability, strength, safety and corrosion resistance. Salt spray testing is also used to evaluate corrosion resistance, with 240-hour testing often used as a practical reference for stainless steel architectural hardware.
A manufacturer can control knob structure, lock matching, spindle size, screw quality, surface finishing, assembly and packaging. A trader may offer many styles, but repeat order consistency can be harder when parts come from different factories.
For bulk replacement projects, stable dimensions are important. One mismatch in latch size, screw length or spindle position can slow down installation across many doors.
A practical OEM / ODM process starts with the old sample or project drawing. Buyers should confirm door thickness, bore size, latch backset, knob design, lock function, finish color, screw type, packaging method and delivery schedule before sampling.
HANGFAT can support customized door knobs, locks and related architectural hardware for apartments, hotels, offices, bathroom doors and commercial renovation projects.
Reliable production includes material inspection, machining checks, polishing review, surface treatment inspection, assembly testing, turning test, latch matching test, salt spray testing and final packing inspection.
Good quality control helps reduce loose knobs, surface scratches, color differences, latch failure and installation complaints during project delivery.
Changing door knobs and locks becomes easier when knobs, latches, screws, strike plates and packing labels are supplied consistently. HANGFAT provides stainless steel door knobs and door locks with manufacturing control, customization support and bulk supply experience, helping buyers improve installation efficiency from sample approval to final project delivery.
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