# The self-drilling bi-metal screw that saves you time and money ## **What is a bi-metal self-drilling screw, and why is it worth using?** The bi-metal screw is a modern fastening technology solution that combines the advantages of two different metals. In our case a hardened carbon steel tip and a stainless steel screw body are welded together to form a self-drilling screw. This cleverly designed combination makes it possible for drilling and fastening to happen in a single operation, while corrosion resistance is also retained. ## **Why is a stainless steel self-drilling screw not enough for the job?** Self-drilling screws made of stainless steel resist corrosion excellently, outdoors too, but they have one serious drawback: they cannot be hardened, so into harder materials (steel, for example) they can be driven only with difficulty or not at all without pre-drilling – only into materials softer than themselves, e.g. aluminium. And pre-drilling is not only time-consuming, it also calls for more tools and more operations. **How does the NONOX bi-metal self-drilling screw work?** The genius of the NONOX bi-metal self-drilling screw lies in its construction: - Hardened carbon steel tip: it works as a drill point – on some variants as a thread cutter – penetrating hard materials such as steel sheets with ease – without separate pre-drilling — and disappears into the material. - Stainless steel body: once the tip has broken through, the body of the screw follows, ensuring a strong and durable fixing while providing maximum corrosion resistance at the surface. The bi-metal screw is thereby able to drill and fasten in a single operation, **resulting in a considerable saving of time.** **The advantages of the bi-metal screw at a glance** - Faster assembly: no pre-drilling needed – drilling and fastening happen in one step.![](https://menet-trend.hu/wp-content/uploads/menet-trend/bi-metal-onfuro-csavarok-2.jpg) - Less tool wear: no tool change is needed, which increases the service life of the tools. - Excellent weather resistance: the stainless body makes it ideal in outdoor, damp, salty or chemically exposed environments too. - Cost-effective solution: fewer operations, less scope for error, less outlay. Where can we use NONOX bi-metal screws? ![](https://menet-trend.hu/wp-content/uploads/menet-trend/bi-metal-onfuro-csavarok-02.png) We use bi-metal screws where fast assembly and long-term corrosion resistance are needed. Typical fields of application: - Outdoor metal structures - Roof and façade claddings - Industrial environments exposed to corrosion - Coastal (salt-air) regions ## Bi-metal screws in the shop: ![](https://menet-trend.hu/wp-content/uploads/menet-trend/qrcode_shop.menet-trend.hu.png) ## bi-metal self-drilling self-tapping screws – Stainless steel fasteners [shop.menet-trend.hu](https://shop.menet-trend.hu/:bi-metal-onfuro-lemezcsavarok) Did you find the article useful? Read our posts on similar topics too: [Bi-metal*, self-drilling, NONOX self-tapping screws](https://menet-trend.hu/nonox-vilag/bi-metal-onfuro-nonox-lemezcsavarok/) [Self-drilling bi-metal*, NONOX self-tapping screw, for thin sheets](https://menet-trend.hu/nonox-vilag/onfuro-bi-metal-nonox-lemezcsavar-vekony-lemezekhez/) --- HTML: