5.5 x 85 Woodfix Self Drilling CSK Wing Screws DIN7504P Bzp

Self drilling countersunk Woodfix screws with break-off wings are DIN 7504P. They can bore straignt through floor boards and when it hits the metal the wings break-off so driiling through the metal can take place.  It will drill the metal up to the length of the screw drill bit section.  Ideal for screwing down vehicle floor boards.

It is important to get the correct tensile strength using the correct self drilling tek screw diameter and length to provide a secure fixing. 

These are bright zinc plated fasteners which is a preventative measure from corrosion. Ideal for using outdoors or in damp or wet environments.  Also bear in mind using different materials can cause fusing through corrosion especially in damp conditions when mixed with aluminium or stainless steel  materials.