Self Drilling Screw Csk Heavy Section Timber/Steel BZP 5.5 × 42mm

BZP csk Phillips or Torx S/drill screws, timb/steel, heavy section. Ideal for fixing timber, plywood, chipboard and similar materials to steel. The wings on the screw shank ream a clearance hole in the timber, allowing the fastener to drill through the steel with no “jacking” or separation of the materials due to thread engagement. Once the drill point has penetrated through the steel, the wings break off, and the threads engage the steel firmly and positively clamping the materials together. The ribbed countersunk head ensures a flush finish without splitting the timber. Available in various sizes.