Self-drilling screws feature a drill-shaped tip at the front, allowing them to penetrate thinner or softer materials without the need for pre-drilling. This design was originally intended for metal, plastic, or composite materials, but it can also be suitable for wood in certain situations.

For example, woods with moderate or soft hardness—such as pine, fir, or plywood—are suitable for self-drilling screws. They are also suitable for non-structural applications, such as temporary constructions, wooden box packaging, or simple shelving.

However, for hardwoods (such as oak or walnut), the material is denser, and self-drilling screws may require greater torque. Caution is advised to prevent wood cracking during insertion, and pre-drilling a small pilot hole is recommended.

Additionally, the thread depth and diameter of self-drilling screws are typically small. When used in load-bearing structures (such as large wooden beam connections), they may loosen over time due to insufficient anchoring strength.

Of course, the length of the self-drilling screw should be chosen based on the thickness of the wood. Ideally, the screw should penetrate the wood to a depth of at least five times its diameter. For example, to fasten a 2 cm thick wooden board, a screw that is 3 to 4 cm long can be used. For hardwoods, it is recommended to use self-drilling screws with a smaller diameter (e.g., 3–4 mm), while for softwoods, a larger diameter (e.g., 5–6 mm) can be used.

When using an electric screwdriver, set it to a medium or low speed to avoid damaging the screws or the wood due to heat generated by high-speed rotation. Reduce the speed as you approach full tightening to prevent over-screwing and potential cracking of the wood.

Jinxin offers self-drilling screws in a wide range of specifications. If you need to purchase in bulk, feel free to contact us for professional consultation and support.