1. Introduction
This manual provides detailed instructions for the proper installation and use of the Hillman Screw-Bolt+ Anchor, 1/2" x 4" (Model 372225). This anchor is designed for secure fastening in concrete applications. Please read all instructions carefully before proceeding with installation to ensure safety and optimal performance.
2. Safety Information
- Always wear appropriate personal protective equipment (PPE), including safety glasses and gloves, during installation.
- Ensure the concrete substrate is sound and free from cracks or damage before drilling.
- Verify that there are no hidden electrical wires, plumbing, or other utilities in the drilling path.
- Do not overtighten the anchor, as this can damage the concrete or the anchor itself.
- Consult local building codes and regulations for specific requirements regarding anchor installation.
3. Package Contents
Each package of Hillman Screw-Bolt+ Anchors (Model 372225) typically contains:
- Hillman Screw-Bolt+ Anchors (quantity as specified on packaging)
Note: Additional tools and accessories required for installation are not included.
4. Setup and Installation
The Hillman Screw-Bolt+ Anchor is designed for efficient and secure installation in concrete. Follow these steps carefully:
- Prepare the Surface: Mark the desired location for the anchor on the concrete surface. Ensure the area is clean and free of debris.
- Drill the Hole: Using an ANSI standard carbide drill bit of the correct diameter (refer to specifications for recommended drill bit size), drill a hole into the concrete to the specified depth. The hole diameter should match the anchor's diameter (1/2 inch). The depth should be sufficient to allow the anchor to be fully seated.
- Clean the Hole: Thoroughly clean the drilled hole to remove all dust and debris. Use a wire brush and/or compressed air for best results. A clean hole is critical for proper anchor performance.
- Insert the Anchor: Place the object to be fastened over the drilled hole. Insert the Hillman Screw-Bolt+ Anchor through the object and into the pre-drilled hole in the concrete.
- Tighten the Anchor: Using a wrench or impact driver with the appropriate hex socket, turn the head of the anchor clockwise. The dust-relief thread profile is designed for faster installation. Continue tightening until the anchor is snug and the attached object is secure. Do not overtighten. The integrated washer with serrations under the head helps secure the attachment.

Image: Hillman Screw-Bolt+ Anchor (1/2" x 4"). This image shows the anchor's hex head, threaded body, and integrated washer, designed for secure fastening in concrete.
5. Operating and Usage
Once installed, the Hillman Screw-Bolt+ Anchor provides a strong and reliable connection in concrete. It is designed for applications requiring high pull-out and shear strength. The embossed diameter, length, and product marks on the head allow for easy identification after installation.
This anchor is suitable for various applications, including:
- Attaching fixtures to concrete walls or floors.
- Securing structural elements.
- General construction and industrial fastening.
6. Maintenance
The Hillman Screw-Bolt+ Anchor is designed for long-term, maintenance-free performance once properly installed. However, periodic inspection of the fastened object and the surrounding concrete is recommended, especially in high-stress or dynamic environments.
- Check for any signs of loosening, corrosion, or damage to the anchor or the concrete.
- If any issues are detected, assess the integrity of the fastening and consider replacement if necessary.
- Do not attempt to reuse anchors that have been removed or show signs of damage.
7. Troubleshooting
If you encounter issues during or after installation, consider the following:
- Anchor not tightening: Ensure the drilled hole is clean and the correct diameter. If the hole is too large or damaged, the anchor may not achieve proper torque.
- Anchor spinning in hole: This indicates the hole is likely too large or the concrete is compromised. Remove the anchor, repair the concrete if possible, or drill a new hole in a different location.
- Difficulty drilling: Ensure you are using an ANSI standard carbide drill bit suitable for concrete and that your drill is set to hammer drill mode if applicable.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | 372225 |
| Fastener Size | 1/2" x 4" |
| Material | Steel |
| Exterior Finish | Alloy Steel |
| Head Style | Hex |
| Thread Type | UNC (Unified National Coarse) |
| Thread Coverage | Fully Threaded |
| Usage | Concrete |
| Certification | ANSI |
| Item Weight | Approximately 2.93 pounds (for a package, individual anchor weight varies) |
| Product Dimensions | 6.3 x 4.3 x 2.9 inches (packaging dimensions) |
9. Warranty and Support
The Hillman Screw-Bolt+ Anchor is covered by a standard manufacturer's warranty. For specific warranty details or technical support, please contact Hillman customer service directly. Keep your purchase receipt as proof of purchase.
For further assistance, visit the official Hillman website or contact their customer support.





