Description
What are 7.5 x 152mm Concrete Frame Screws used for?
Concrete frame screws are specialized high-tensile fasteners used for structural installations where a secure, non-expansive fix is required. The 152mm length is specifically designed for fixing modern window and door frames through a cavity and into the inner leaf of a building. These concrete frame screws are preferred by professional installers because they do not rely on expansion (like traditional rawl bolts), meaning they can be used closer to the edge of the brickwork without the risk of splitting or cracking the masonry.
Why Choose a Torx Head for Masonry Fixings?
Driving a 152mm screw into solid concrete requires significant force. Our concrete frame screws utilize a T30 Torx (Star) drive system. This provides a much more secure connection between the screwdriver bit and the screw head compared to traditional Pozi or Phillips drives. This high-torque transfer ensures that the concrete frame screws can be driven fully home in one smooth motion, even in the hardest engineering bricks or reinforced concrete.
High-Low Thread Technology for Maximum Grip
At ECO HEAT SHOP, we supply fixings that prioritize structural integrity. These concrete frame screws feature a unique “high-low” serrated thread. As the screw is driven into a pre-drilled pilot hole, the hardened threads cut a clean path into the masonry, creating a mechanical interlock that is incredibly resistant to pull-out forces. The zinc-plated finish ensures long-term protection against corrosion, making them suitable for both internal and external structural applications.
Technical Specification & Installation Tips
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Product Name: Concrete Frame Screws
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Dimensions: 7.5mm (Diameter) x 152mm (Length)
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Pack Size: 100 Pieces
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Drive Type: T30 Torx (Star Drive)
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Material: Case-Hardened Carbon Steel (Zinc Plated)
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Installation Advice: To ensure a successful fix with concrete frame screws, you must drill a 6.0mm or 6.5mm pilot hole (depending on the density of the masonry) using a SDS masonry bit. Ensure the hole is at least 10mm deeper than the screw’s intended penetration to allow for dust clearance.
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