T-STAR Screws
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Spax Pozi Flat Countersunk Wirox Screws – 4.0mm Diameter (Box of 200)
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Soudal Aquafix All Weather Sealant – Clear 300ml
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Everbuild General Purpose Silicone – Brown 290ml (Box of 12)
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OX Trade Metric Tape Measure – 8m
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T-STAR Screws
T-STAR and T-STAR Plus screws are a design of screw made by SPAX®. They offer an unusual screw head design for an ultra-tight fit, contributing to maximum torque with the drill and very little chance of a ‘cam out’ where the drill bit slips out, even at unusual angles.
The major difference between the T-STAR and conventional screws is the hexolubular or star design. Originally developed by Camcar Textron as Torx, this is a gear-shaped bit groove with six spokes. The result is a fit with the drill bit that is practically airtight. This means that the drill can apply a huge degree of torque to the screw. T-STAR Plus adds a indentation to the screw head, which provides an even more secure fit, allowing for comfortable drilling even at odd angles like overhead.
ERoofing sells an impressive array of T-STAR screws, made by SPAX.