Product Overview
High strength TC bolts are engineered fasteners designed to deliver reliable mechanical performance under demanding structural, mechanical, and industrial load conditions.
Technical Parameters
| Parameter | Specification |
| Material & Surface | High-strength steel / Alloy steel / Carbon steel; Plain / Black Oxide / Zinc Plating / Hot-Dip Galvanized / Custom Coatings |
| Corrosion Protection Level | Indoor use to heavy outdoor / marine-grade protection, depending on surface treatment |
| Thread Diameter | M16 – M30 (customizable) |
| Bolt Length | 40 – 220 mm (customizable) |
| Strength Grade | 8.8 / 10.9 / 12.9 |
| Torque Value | 20 – 500 Nm (depending on size and application) |
| Thread Type | Metric coarse thread (standard structural configuration) |
| Compliance Standards | ASTM A325 / EN 14399 / ISO 898 |
| Installation System | Torque-controlled TC wrench with shear-off spline end |
Key Features
Torque shear head with break-off spline drive section.
Preload-controlled bolt shaft geometry.
Mating surfaces for bolt, nut, and washer engagement.
External thread geometry for full-load engagement in steel assemblies.
Single-use shear-end design preventing re-tightening.
Applications
Bridge and Construction Engineering
Ensures uniform connection strength for large-scale steel structures.
Automotive Manufacturing
Secures chassis, engine mounts, and body structures with precise torque control.
Wind Power Generation
Provides stable fastening for turbine components under dynamic loading.
Railway Infrastructure
Used in track assembly, bridges, and related heavy steel structures.
Power Facilities
Secures high-voltage and industrial equipment, minimizing failure due to improper fastening.
Supply Chain Alignment & Support
Batch-level production consistency for project supply continuity
Dimensional and mechanical conformity to specified structural standards
Traceable production records covering material grade, heat treatment, and batch identification
Coating and surface treatment uniformity across production lots
Specification alignment during procurement and engineering review processes
Quality Assurance
Standardized forging and heat treatment processes to maintain consistent mechanical properties
Batch traceability for dimensions, tensile strength, and torque characteristics
Mechanical testing including tensile, hardness, and torque consistency
Surface coating inspection to ensure uniformity and corrosion resistance
Frequently Asked Questions
Q: What is the maximum load a high strength TC bolt can handle?
A: Load capacity varies by bolt size, strength grade, and structural standard (e.g., ASTM A325 / EN 14399).
Q: Can these bolts be reused after installation?
A: No. The shear-end is designed for single-use installation and cannot be retightened.
Q: Are custom lengths or coatings available?
A: Yes. Custom dimensions and surface treatments can be produced based on project requirements.
Q: How is proper installation confirmed?
A: Installation is confirmed when the spline end shears off at the designed torque level, indicating full preload has been achieved.
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