To screw into hollow metal effectively and securely, the recommended approach involves using specific types of fasteners and targeting structurally sound areas.
The most recommended method is to use self-tapping screws that are designed for use with metal. These specialized screws eliminate the need for pre-drilling because they can create their own threads as they are driven into the material.
For a strong and lasting hold, especially when dealing with hollow structures like doors, it is best to screw into the solid parts of the metal, such as areas near the hinges or the lockset where the material is typically reinforced or thicker.
Key Steps & Considerations
Screwing into hollow metal requires understanding the properties of the material and selecting the right tools. Unlike solid wood or concrete, hollow metal offers less material for a standard screw to grip onto.
- Choose the Right Screw: As highlighted, self-tapping metal screws are crucial. They have a hardened tip that acts like a drill bit and threads along the shaft designed for metal.
- Locate Solid Areas: Hollow metal structures often have reinforced sections. Identifying and targeting these solid points provides significantly better support for the screw and the item being attached. Look for areas near:
- Hinges
- Locksets
- Frame edges
- Internal bracing (if known)
- Driving the Screw: Use a drill or driver suitable for the screw size. Apply steady pressure and drive the screw straight. The self-tapping tip will cut through the metal and the threads will form the connection. Avoid over-tightening, which can strip the threads or damage the metal.
Why Self-Tapping Screws?
Using self-tapping screws for metal offers several advantages:
- Efficiency: No separate drilling step is needed.
- Thread Creation: They form threads specifically suited for metal, ensuring a tighter fit.
- Reduced Damage: Designed to cut cleanly through metal, minimizing distortion compared to forcing non-metal screws.
| Screw Type | Pre-drilling Required | Material Compatibility | Use Case Example |
|---|---|---|---|
| Self-tapping Metal | No | Metal | Screwing into metal doors |
| Standard Wood | Yes | Wood | Not suitable for metal |
Practical Application
If you are, for instance, installing hardware onto a hollow metal door, following these steps ensures a secure attachment:
- Gather self-tapping screws specifically rated for metal.
- Identify locations for the hardware that align with the door's solid internal structure (e.g., near the hinges).
- Mark the screw placement.
- Drive the self-tapping screws directly through the metal at the marked points.
By focusing on appropriate fasteners and leveraging the structural integrity of the solid areas within the hollow metal, you can achieve a secure and reliable connection.
