![Self drilling screw Eco, Bigpack](https://heicko.it/out/pictures/generated/category/thumb/1140_250_75/3212_mass.jpg)
• Metal tapping screw thread Ø 3.9 mm
• Drill tip at least 4.5 mm
• Countersunk head 90°, cross recess PH2
• Roller sorted uptil 32 mm length
• Surface: blue zinc plated, min. 5 my
Ø 7.4 mm (l = 11-22 mm) without brake ribs
Ø 7.1 mm (l = 25-45 mm) with brake ribs
• For steel reinforcement up to 2 mm