Self-drilling screws with square recess

• Screws SDS are designed to assemble metal 2 sheets up to times 1,5mm each together in a single operation.

• Zinc plated steel
• Round head with square recess for BIT, available in type 3.5 (size square head of bit 2.5 x 2.5mm) or 4.2/4.8 (size square head of bit =2.5 x 2.5mm)
• Drill point
• Thread of 3.5, 4.2 or 4.8mm with according headsize of 6.7, 8.0 or 9.3mm
• Serrations under the head for a better grip on the surface
• Bit supplied in each box of screws
• Shear force : 4.6 N
• Approved according DIN7504N standard

• Bit with square head length of 45 mm or 75 mm long type BIT SDS
• Screwdriver type SD 4.2

• The assembly of the metal sheets shall be fastened by means of self-drilling screws with square recess.
• ATC
• type SDS