5.5 x 70 Woodfix Wing Self Drilling Screws DIN7504P Bzp

Self drilling Woodfix countersunk screws are DIN 7504P specification. Designed to drill straight through wooden floor boards and the wings break off as it begins driiling into the metal.  It will drill the thickness of the metal to the length of the drilling screw section.  Ideal for fixing floor boards on truck trailers. They have a pozi CSK head taking a PZ3 screwdriver bit

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.