Our 100-piece pack of Concrete Frame Screws (7.5 x 112mm) provides a rapid, high-strength solution for fixing window and door frames directly into masonry. Designed to cut their own thread into brick, stone, and concrete, these specialized “direct-fix” fasteners eliminate the need for plastic expansion plugs.
No Plug Required: Direct-to-masonry installation reduces on-site labor and material costs.
T30 Torx Drive: Deep star-drive recess ensures maximum torque transfer and eliminates cam-out.
Optimum 112mm Length: The preferred size for fixing 70mm profiles through medium cavities and into structural masonry.
£8.49 Incl. VAT
Concrete frame screws (also known as masonry bolts or thunderbolts) are the professional standard for high-load structural fixings. The 112mm length is specifically engineered to bridge the gap between a standard window frame and the structural inner leaf of a building. Unlike traditional sleeve anchors, these concrete frame screws do not exert outward expansion pressure, making them the safest choice for fixing close to the edges of masonry without the risk of splitting the brickwork.
Driving a 112mm fastener into high-density masonry requires significant rotational force. Our concrete frame screws utilize a T30 Torx (Star) drive system. This provides a vastly superior mechanical grip 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 home at high speeds in a single motion, even in the hardest engineering bricks or reinforced concrete.
At ECO HEAT SHOP, we supply fixings designed for long-term structural integrity. These concrete frame screws feature a unique “high-low” serrated thread pattern. 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 shear and pull-out forces. The bright zinc plating ensures the fixings remain protected against corrosion in both internal and external environments.
Product Name: Concrete Frame Screws
Dimensions: 7.5mm (Diameter) x 112mm (Length)
Pack Size: 100 Pieces
Drive Type: T30 Torx (Star Drive)
Material: Case-Hardened Carbon Steel (Zinc Plated)
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 an SDS masonry bit. Ensure the hole is at least 15mm deeper than the screw’s intended penetration to allow for dust clearance, ensuring the screw can be fully tightened without bottoming out.
| Weight | 0.44 kg |
|---|---|
| Dimensions | 112 × 7.5 × 7.5 mm |
ECO Heat Shop Ltd provides national distribution for plumbing and heating supplies across England, Scotland, and Wales. Orders placed before the 18:00 PM (Afternoon) cutoff are typically processed for same-day dispatch.
View Full Shipping & Collection Policy ›Hours: Monday – Saturday: 08:30 AM – 06:30 PM | Sunday: Closed
Location: Unit 8 West Cross Shopping Centre, Oldbury Rd, Smethwick, B66 1JG
In-shop precision key cutting available during standard operational hours. Professional while-you-wait service for Smethwick residents and trade contractors.
Smart supplies for real heat.
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