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The Top Knobs M4-25 is a 25 mm (1 inch) M4 Phillips pan head machine screw designed for attaching cabinet knobs, pulls, and decorative hardware to doors and drawer fronts. It is the standard mounting screw supplied and specified by Top Knobs for their hardware line.
Mounting a knob or pull requires a screw long enough to pass through the door or drawer front and engage the hardware threading on the other side. At 25 mm, this screw suits typical cabinet door and drawer front thicknesses where the combined material and hardware engagement falls within that reach. It is the go-to length when installing Top Knobs hardware on standard 3/4-inch stock with a shallow hardware base, and it is a reliable replacement when the original screw is missing or lost before install day.
Top Knobs hardware is built to M4 metric threading, and this screw matches that specification precisely. Swapping in a non-M4 fastener risks cross-threading the hardware base or leaving the knob loose over time. The pan head sits flush against the back face of the door panel without requiring a countersink, keeping the installation straightforward and the interior panel surface clean.
Cabinet installers ordering Top Knobs hardware in volume keep a supply of M4-25 screws on hand so a missing fastener never stalls a job. Designers specifying Top Knobs pulls for a full kitchen or bath project include this screw as part of the hardware order to ensure every piece ships with a correctly sized, thread-matched fastener. Homeowners replacing a single knob mid-project find this screw lets them finish the install without improvising with a hardware-store substitute that may not match the thread.
This screw is designed for Top Knobs hardware built to the M4 thread standard. Confirm the thread specification of your specific hardware piece before ordering if you are unsure.
The right screw length depends on the combined thickness of your door or drawer front plus the depth of the hardware base. Measure the total stack before selecting a length. At 25 mm, this screw works well for standard 3/4-inch stock with a shallow hardware base. The family also includes longer lengths for thicker stock.
No. The pan head bears flat against the surface and does not need a countersunk recess. It seats against the back face of the door or drawer panel as-is.
A standard #2 Phillips bit drives this screw. No specialty bit is required.
A thread-matched, correctly sized screw is what keeps a knob or pull seated firmly through years of daily use. The Top Knobs M4-25 delivers that fit for standard cabinet door and drawer front installations, so the hardware goes on right and stays that way.
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