- Förch - (4.0 x 50 mm - 500 pieces) - professional wood construction screws - double folded thread - ETA approval - countersunk screw, bright galvanised

Wood screws partial thread countersunk head 90° galvanised. · The screw is made from a special coated and hardened carbon steel. Special wood screw with a screw tip type D milling ribs above the thread. Type D stands for double folded thread. The special geometry of the screw tip type D prevents splitting effect when screwing in. The screw-in resistance is also reduced. Up to 3 times higher corrosion resistance than conventional galvanised blue surfaces. Can be used in use classes 1 and 2 according to DIN EN 1995 - Eurocode 5. Good resistance to mechanical stress. Prevents contact corrosion with attachments. Free from chromium (VI) oxide. Not suitable for tannin-containing woods.