Holztechnic TLLEVO combines the mechanical performance of TLL wafer‑head screws with the long‑term protection of the C4 EVO coating. The multi‑layer epoxy system with aluminium flakes resists aggressive atmospheres and delivers best‑in‑class corrosion performance—no rust after 1440 hours of salt‑spray testing (ISO 9227). The wide wafer head acts as an integrated washer, distributing load to prevent pull‑through and improving capacity under wind uplift or dimensional movement. A TX40 recess provides secure torque transfer, while the partial thread actively draws timber members together for tight, rigid joints. Suitable for exterior service class 3 and atmospheric corrosivity class C4 (coastal and industrial areas).
- Diameter: 8.0 mm
- Drive: TX40 (Torx)
- Head: Wafer/flange head, integrated washer for large bearing area
- Thread: Partial thread for strong clamp force
- Coating: C4 EVO epoxy with aluminium flakes, approx. 20 μm
- Material: High‑strength carbon steel
- Performance: No rust after 1440h salt‑spray (ISO 9227)
- Use class: Exterior/service class 3, atmospheric class C4
✅ Key Features:
- C4 EVO anti‑corrosion coating for demanding outdoor environments
- 1440‑hour salt‑spray resistance (ISO 9227), best‑in‑class protection
- Wafer head acts as an integrated washer to resist pull‑through and uplift
- Partial thread delivers powerful pull‑down and tight joints
- TX40 drive for high torque, fast installation and reduced cam‑out
- High tensile, yield and torsional strength on a carbon‑steel core
🔧 Applications:
- Exterior timber‑to‑timber connections in service class 3
- Coastal/industrial C4 environments: façades, decks, pergolas, frames
- CLT/LVL and dense timber elements where large bearing area is beneficial
- Roof and wall diaphragms, brackets, plates and panel fixings
📦 Why Choose TLLEVO?
- Wafer head saves separate washers while boosting bearing capacity
- Proven outdoor durability with advanced C4 EVO coating
- Reliable clamp force and clean finish with TX40 drive and partial thread
