Metal tapping screws are threaded fasteners with autonomous cutting capabilities. Their unique structural design enables efficient synergy between the base material and the fastener. These screws offer particular advantages in applications such as thin-plate joining and composite assembly.
1. The tip of the metal tapping screw features a tapered guide, allowing the subsequent cutting edge to simultaneously form the mating thread in the metal base. The hardened thread surface produces a cold-work strengthening effect during the screwing process, improving local structural strength. The spiral groove structure provides both chip removal and stress distribution, preventing jamming caused by chip accumulation.
2. Drilling and thread formation are completed in a single operation, eliminating the risk of pre-drilling misalignment. The thread threads form a continuous engagement surface with the base material, maintaining preload stability under vibration. The screw neck design prevents over-penetration deformation in thin-plate joining, preserving the surface integrity of the fastened parts.
3. Stainless steel is highly stable in humid environments, and its surface passivation film inhibits electrochemical corrosion. In high-temperature conditions, it can mitigate joint loosening caused by thermal cycling.
4. Suitable for steel, aluminum, wood, and composite substrates.
| Specification | Thread diameter d (mm) | Head diameter dk (mm) | Head thickness k (mm) |
| M1 | 1 | 1.75 | 0.65 |
| M1.2 | 1.2 | 1.82 | 0.7 |
| M1.4 | 1.4 | 2.43 | 0.98 |
| M1.7 | 1.7 | 3.27 | 1.13 |
| M2 | 2 | 3.7 | 1.21 |
| M2.3 | 2.3 | 4.2 | 1.5 |
| M2.6 | 2.6 | 4.6 | 1.7 |
| M3 | 3 | 5.3 | 2 |
| M3.5 | 3.5 | 6.5 | 2.5 |
| M4 | 4 | 7 | 2.6 |
| M5 | 5 | 8.7 | 3 |
| M6 | 6 | 12 | 4.2 |
| M8 | 8 | 13.9 | 5 |
The hardened threads of metal tapping screws act as a cutting tool. The screw tip penetrates the material, while the fluted edge carves a precisely mating thread. This eliminates the need for drilling, reducing installation time by 40%.
Of course. Huimei offers Dacromet-coated metal tapping screws, which are resistant to 500 hours of salt spray. For extreme conditions, SUS316 stainless steel resists oxidation, acids, and salt water.
Huimei produces metal tapping screws that meet international standards. We are committed to providing our customers with high-quality screws. Please feel free to contact us.
