Concrete Screws – Carbon Steel – Indoor Use

Product Overview

Discover the versatility of our 7.5 × 100mm high-performance countersunk concrete screws, designed for direct installation into solid concrete, brick, block, or masonry without the need for a plug. These screws are crafted from case-hardened carbon steel with a durable zinc-plated finish, ensuring rapid installation, high pull-out resistance, and dependable torque control. The countersunk head offers a neat, flush finish, ideal for visible or surface-mounted fittings, while the serrated single-thread design guarantees fast cutting action and secure anchorage in dense substrates.

Features & Benefits

• Material composition: Case-hardened carbon steel provides superior torsional strength and thread retention under load.
• Drive type: Pozi recess ensures precise torque transfer and reduced cam-out.
• Head design: Countersunk form ensures a flush, professional finish.
• Thread form: Serrated single-thread for rapid cutting and high mechanical interlock.
• Corrosion resistance: Zinc-plated coating provides reliable protection in dry interior environments.
• Nominal size: 7.5 × 100mm.
• Box quantity: Supplied in a box of 100 for consistent supply and efficient use.

Applications

• Heavy frames: Secure fixing for door and window frames to masonry.
• Lintels: Reliable anchorage for structural steel or timber lintels.
• Roof plates: Strong connection between timber and brick substrates.

Installation Guidance

• Pilot holes: Drill 6mm pilot holes using an SDS or masonry bit to a minimum of 10mm beyond embedment depth.
• Drive selection: Use a Pozi No.3 bit for controlled torque application.
• Insertion method: Drive at moderate speed without hammer action to maintain thread integrity.
• Finishing: Tighten until the head seats flush; avoid overtightening.

Compliance & Performance

• Manufacture standard: Produced to EN 14592 for mechanical fasteners.
• Mechanical strength: Case-hardened for enhanced torsional capacity and consistent pull-out performance.
• Surface finish: Zinc electroplated to ISO 2081 for internal corrosion protection.

FAQs

• Q: Can these screws be used outdoors?
  A: They are designed for dry interior environments due to their zinc-plated finish.
• Q: What is the recommended pilot hole size?
  A: A 6mm pilot hole is recommended for optimal installation.
• Q: Are these screws reusable?
  A: While possible, reusing screws may reduce their effectiveness.