Replacing old style door knobs is not only a renovation task. For apartments, hotels, offices and commercial interiors, the replacement must match door thickness, latch backset, bore size, lock function and finish style. Poor matching can cause loose knobs, latch misalignment, stiff turning or visible gaps on the door surface.
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 bulk replacement projects and interior renovation orders.
| Check Item | Why It Matters |
|---|---|
| Door thickness | Ensures the knob set fits correctly |
| Bore hole size | Avoids extra cutting or loose fitting |
| Latch backset | Matches the distance from door edge to knob center |
| Strike plate position | Keeps closing smooth and secure |
| Finish color | Maintains consistent interior appearance |
Many markets commonly use 60 mm or 70 mm latch backset for interior door hardware. EN 1906 is widely used for lever handle performance, covering durability, strength, safety and corrosion resistance. For architectural hardware, salt spray testing is also used to evaluate corrosion resistance, with 240-hour testing often used as a practical reference for stainless steel products.
A manufacturer can control knob structure, spindle size, latch matching, screw quality, surface finishing, assembly and packaging. A trader may offer many styles, but repeat order consistency can be harder to manage when parts come from different factories.
For bulk replacement projects, stable dimensions are critical. One small mismatch in latch size, screw length or spindle position can delay installation across many doors.
A practical OEM / ODM process starts with the old hardware sample or door 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 and related door hardware for apartments, hotels, offices, bathroom doors and commercial renovation projects. Our team can review samples or hardware schedules before mass production.
Reliable door knob 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.
Replacing old style door knobs becomes easier when knob sets, latches, screws, strike plates and packaging labels are supplied consistently. HANGFAT provides stainless steel door knobs and architectural hardware 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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