self drilling screw NoRi, countersunk head, metal tapping screw thread, roller sorted, "Top Silver 800" 3.9x25 mm ( 2000 ST ) 25 mm
Product number: 3112120-3.9-25
metal tapping screw thread Ø 3.9 mm
drill tip 4.5 mm
countersunk head 90°, cross recess PH2
head diameter depending on length:
Ø 7.4 mm (l = 16-22 mm)
Ø 7.1 mm (l = 25-45 mm)
surface coated "Top Silver 800"
roller sorted
for steel reinforcement up to 3.5 mm