The Hex Washer Head Slotted Concrete Screw (often referred to globally as a “Blue Concrete Screw” or “Masonry Screw”) is the high-performance solution for fastening timber, metal, and fixtures directly into concrete and brick without the need for plastic plugs or shields. Featuring a specialized Blue Ruspert ceramic coating, our Hex Washer Head Slotted Concrete Screw offers superior corrosion resistance compared to traditional zinc plating, making it ideal for outdoor decking, fencing, and basement renovations.
Product Overview: Manufactured from hardened C1022A Carbon Steel, these screws are heat-treated to cut their own mating threads into masonry substrates. The versatile head design combines a Hex drive for high-torque driving with a Slot drive for adjustment, ensuring you can always tighten the fastener even if you don’t have a nut driver handy.
Hex Washer Head Slotted Concrete Screw Specifications
| Product Name | Concrete Screw / Masonry Screw / Tapcon Style Anchor |
| Head Style | Hex Washer Head with Slot |
| Material | C1022A Steel (Case Hardened) |
| Surface Treatment | Blue Ruspert (Ceramic Anti-Corrosion Coating) |
| Thread Type | Hi-Low Thread (for Concrete Cutting) |
Engineering Insight: Why “Blue Ruspert”?
The blue color isn’t just for looks. Ruspert is a high-grade metal surface processing technology that consists of three layers:
- Metallic Zinc Layer: The base layer for galvanic protection.
- Chemical Conversion Film: Improves adhesion.
- Baked Ceramic Surface: The visible blue topcoat. This ceramic layer creates a tough barrier against salt spray, acid rain, and weathering, often lasting 500 to 1000 hours in salt spray tests.
For more details on screw coatings, please refer to the Screw entry on Wikipedia.
Installation Guide
Unlike plastic plugs, the Hex Washer Head Slotted Concrete Screw requires a specific pre-drilled hole size:
- Drill: Use a hammer drill and a masonry bit. The hole diameter must be slightly smaller than the screw diameter (e.g., use a 4mm bit for a 5mm screw, or 5/32″ bit for a 3/16″ screw).
- Clean: Crucial Step! Blow out the dust from the hole. Excess dust will pack at the bottom and prevent the screw from seating fully.
- Drive: Drive the screw in using a hex socket or slotted screwdriver. The hardened threads will cut into the concrete wall, creating a mechanical interlock.
Frequently Asked Questions (FAQ)
Q: Can I remove and reuse them?
A: Yes, they can be removed. However, reusing the same screw in the same hole may result in reduced holding power as the threads might strip the concrete path slightly.
Q: How close to the edge can I install them?
A: Because they cut threads rather than expanding outward (like shield anchors), they create less stress on the concrete. This allows for installation closer to the edge than traditional expansion bolts.
Need Blue Concrete Screws?
Handan Bolt manufactures Hex Washer Head Slotted Concrete Screws in bulk. We offer standard sizes like 3/16″ and 1/4″ (4.8mm / 6.3mm) with custom packaging options.
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