Hexagon Head - For Heavy Steel 4.0-12.5mm with Bonded Washer - Full Thread - Self Drilling Screws

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Features & Applications

Hexagon head screws with a self-drilling point and bonded EPDM washer for roofing, cladding and fastening to structural steel. The fine thread and TEK 5 point are listed for steel thicknesses from 4.0 to 12.5mm. Sizes include 5.5 x 38mm and 5.5 x 50mm, each supplied in packs of 100. The finish is a three-stage zinc-ceramic coating.

Installation

1. Screws should be installed using a Tek screwdriver or cordless

drill with adequate power and a drilling speed of between 1500

– 2500 rpm. (IMPORTANT - Impact screwdrivers will damage

the threads and must not be used)

2. Use a 5/16" socket to install the screw perpendicularly into the

steel maintaining steady pressure without forcing the tool.

3. Stop inserting the screw as soon as the compression disc of the

bonded washer changes from convex to flat. Overtightening the

screw is liable to damage the thread particularly in thin steel.

Product Data

Material: SAE C1022 Carbon Steel