Concrete Screws

Size:7.5 x 42mm - 7.5 x 212mmHead: Countersunk, diameter 11mmDrive: Star T30Material: Case hardened carbon steel - zinc and yellow passivated coatingDescription:A heavy duty self-tapping concrete screw suitable for fixing wood, metal or PVC frames to masonry, offer users the option of concrete or masonry fastening without or with anchors.The screw will cuts own thread into masonry once a pilot hole has been pre-drilledProduct Features & Benefits:Special thread cuts into masonry and ensures high fixing strengthSelf-countersinking nibs under the head of the screws ensure flush finishFast and simple installationTorx recess provides positive driveInstallation:Drill a hole through the frame into the masonry at least 13mm deeper than the screw lengthDrive the screw through the frame into the masonryEmbedment into the masonry should be between 25mm & 60mm - dependant on hardness of material