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The metal washer distributes pressure beneath the screw head
Fit the steelwork or other fixture and tighten the nut to the specified installation torque
Voids or irregularities in the substrate
Cracked or non-cracked concrete
38mm or 80mm Tek Screws
Heavy Section Tek Screws with Washers | 5.5mm Steel Screws Length:80mm Length - Box of 100 The metal washer distributes pressureHeavy Section Tek Screws with EPDM Washers Heavy section self drilling screws for fixing steel to steel without the need to pre drill a pilot hole. Designed for use with thicker steel sections, these 5. 5mm Tek type screws drill, form their own thread and secure the fixture in a single operation. Each screw has a hexagonal head for positive driver engagement and a 16mm EPDM sealing washer. The washer helps distribute the clamping force and seals