Holztechnic TLLEVO screws pair the mechanical strength of TLL wafer‑head fasteners with the long‑lasting protection of the C4 EVO coating. This multi‑layer epoxy system with aluminium flakes delivers best‑in‑class corrosion resistance—no rust after 1440 hours of salt‑spray testing per ISO 9227. The wide wafer head acts as an integrated washer, distributing load to resist pull‑through and wind uplift, ideal where timber movement occurs. The TX30 drive provides secure torque transfer, while the partial thread actively draws members together for tight, rigid joints. Suitable for exterior service class 3 and atmospheric corrosivity class C4 (coastal and industrial areas).
- Diameter: 6.0 mm
- Drive: TX30 (Torx)
- Head: Wafer/flange head, integrated washer for large bearing area
- Thread: Partial thread for powerful clamping
- Coating: C4 EVO epoxy with aluminium flakes, approx. 20 μm
- Core 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 coating for outstanding outdoor corrosion resistance
- 1440‑hour salt‑spray performance (ISO 9227)
- Wafer head spreads load, resists pull‑through and uplift
- Partial thread delivers strong pull‑down and tight joints
- TX30 drive for high torque and reduced cam‑out
- High tensile, yield and torsional strength
🔧 Applications:
- Exterior timber‑to‑timber connections in service class 3
- Coastal and industrial C4 environments: façades, decks, pergolas
- CLT/LVL and dense timbers where larger bearing area is beneficial
- Roof/wall diaphragms, plates, brackets and panel fixings
📦 Why Choose TLLEVO?
- Integrated washer head saves components and boosts bearing capacity
- Proven outdoor durability with advanced C4 EVO technology
- Fast, reliable installation with TX30 drive and partial thread
