TC Bolts Including A325, A490, And Galvanized Tension Control Bolts
High-Quality Tension Control Bolts for Structural Steel Applications
Baco Enterprises offers a comprehensive selection of tension control bolts, ensuring immediate availability in all sizes, finishes, and price points. Our bolts meet stringent industry standards and provide unmatched strength and durability for structural applications.
What Are Tension Control Bolts?
Tension control bolts, also known as TC bolts or twist-off bolts, are high-strength fasteners designed for steel connections. They enhance structural integrity and ensure long-lasting performance. These bolts come as a complete fastener assembly, including a nut and washer, streamlining installation and reducing labor costs.
Tension Control Bolt Installation & Functionality
The low-profile head design of TC bolts makes them ideal for visually exposed steel structures. Their unique configuration ensures proper tensioning, improving the reliability of steel connections.
How Do TC Bolts Work?
Two primary factors contribute to their self-calibration:
1. Lubrication – Reduces friction and ensures smooth tensioning.
2. Spline-Groove Depth – The precisely engineered groove allows the spline to shear off at the correct tension.
Required Installation Tools
A shear wrench (TC gun) is essential for proper installation. Unlike traditional torque wrenches, this electric tool does not require calibration. Instead, it ensures precise tensioning by snapping off the bolt’s spline upon reaching the correct tension.
For detailed specifications info click here ASTM-A325, ASTM-A490.
ASTM-Compliant Tension Control Bolts
Baco Enterprises supplies two primary types of TC bolts:
- ASTM A325 (F1852) TC Bolts – Available in plain or mechanically galvanized finishes.
- ASTM A490 (F2280) TC Bolts – High-strength bolts available in a plain, uncoated finish.
Bolt Sizes and Specifications
- Diameters: Available in sizes from 5/8" to 1 1/4"
- Lengths: Up to 8 1/2"
- Finishes: Plain, mechanically galvanized, or hot-dip galvanized
Why Choose TC Bolts Over Hex Head Bolts or Rivets?
While rivets were once the standard fastener in structural steel applications, TC bolts have become the industry preference due to their superior performance and ease of installation. Compared to hex head bolts, TC bolts offer three to four times faster installation while maintaining the same high-strength specifications.
Fastener Comparison: TC Bolts vs. Rivets vs. Hex Head Bolts
- Installation Speed: TC bolts install the fastest, followed by hex head bolts, while rivets take the longest.
- Precision Tensioning: TC bolts ensure accurate tension automatically, hex head bolts require torque checks, and rivets lack precision tensioning.
- Tool Requirements: TC bolts require a shear wrench, hex head bolts need a torque wrench, and rivets need a rivet gun.
- Structural Integrity: Both TC and hex head bolts offer superior strength, while rivets provide moderate strength.
| TC Bolts Advantages | Benefit of Using TC Bolts |
|---|---|
| Pre-Calibrated Tension Control | Ensures precise tension without requiring torque measurements, resulting in accurate installation. |
| Improved Installation Efficiency | Faster installation with fewer steps; eliminates the need for torque wrenches and secondary checks. |
| Reduced Labor Costs | Requires fewer tools and less time for installation, minimizing labor costs and boosting efficiency. |
| Simplified Inspection | Once the spline snaps off, correct tension is achieved, reducing the need for complex testing or re-torque checks. |
| Consistent Quality And Reliability | Ensures uniform tension across all bolts, enhancing structural integrity and reducing potential maintenance needs. |
| Improved Worker Safety | Minimizes risks of over-torquing or under-torquing, reducing the likelihood of structural failures and workplace hazards. |
| Quiet Operation | Operates more quietly than impact wrenches, enhancing on-site safety and comfort. |
| Reduced Tool Wear And Tear | Tools last longer as the controlled installation reduces wear and tear. |
| Corrosion Resistance Options | Available in coatings such as galvanized finishes, suitable for harsh environments. |
| No Need For Specialized Skills | Easy to install, even by less-experienced workers, making it a practical solution for large projects. |
| Compatibility With Structural Applications | Ideal for high-stress environments requiring strength and vibration resistance, like bridges and steel frameworks. |
A325 & A490 TC Bolts: Performance in Various Environments
- Moderate Temperature Use: Optimal performance between 40°F and 90°F.
- Galvanized Tension Control Bolts: Ideal for outdoor or exposed applications, providing corrosion resistance.
- Plain Finish Bolts: Suitable for indoor or enclosed steel structures.
Why Source Tension Control Bolts from Baco Enterprises?
Choosing the right TC bolt is critical for successful steel connections. As a trusted supplier with over 20 years of industry expertise, Baco Enterprises ensures the highest quality control for A325 and A490 structural bolts.
Quality Assurance & Testing
- Skidmore Bolt Testing – Each bolt assembly undergoes Skidmore-Wilhelm testing to verify tension compliance.
- Random Lot Testing – Ensures all bolts meet tolerance and integrity standards.
- AISC & RCSC Compliance – Our bolts adhere to industry regulations for guaranteed performance.
Reliable Supply & Fast Shipping
- Extensive Inventory – We stock a full range of TC bolts, timber bolts, anchor bolts, and fasteners.
- Fast Regional Delivery – Serving NY, NJ, CT, PA, MA, RI, MD, DE, NH, ME, and VT with quick shipping.
- Expert Sales & Support Team – Assisting customers in selecting the most suitable fasteners for their projects.
Work Directly with a Trusted Supplier
Unlike generic fasteners, our TC bolts are engineered for maximum durability and performance. Many vendors rely on us for their resale stock, but when you purchase directly from Baco Enterprises, you receive:
- Unmatched quality assurance
- Competitive pricing
- Dedicated customer support
For the highest-quality tension control bolts and expert guidance, trust Baco Enterprises to meet your structural fastener needs with efficiency, precision, and speed.
