The gypsum fibreboard screw with HiLo thread.
The fischer gypsum fibreboard screw with HiLo thread FSN-TPG F fastens gypsum fibreboard onto wooden posts and metal profiles up to 0.7 mm thick without pre-drilling. The screw is hardened and phosphate-treated. The screw with a small countersunk head and cross-slot recess PH can be rendered flush.
