Self-tapping screw ShS GVL 3.9x25 (pack 200 pcs) Tech-Krep/Zitar 112702

SGVL self-tapping screw is made of carbon steel with a black phosphate or oxide coating. It has a countersunk head with notches for countersinking and a PH2 cross-recess, a double-start thread (2 threads of different pitch) and a sharp tip. Designed for fastening gypsum fiber boards (GVK) to metal profiles up to 0.9 mm thick and wooden guides without pre-drilling.