Torshear Type High-Strength Bolts
Torshear Type High-Strength Bolts, also known as Tension Control Bolts (TC Bolts), are premium-grade fasteners engineered for critical structural connections in steel construction. These bolt sets, comprising a high-strength bolt, a nut, and a plain washer, are designed to deliver exceptional tensile strength, precise preload control, and long-term reliability under demanding conditions.
Key Features & Advantages
- Precision Preload Control: The unique design features a splined end (or “mushroom head”). During installation, tightening continues until this splined end shears off, providing a visual and mechanical confirmation that the specified, consistent preload tension has been accurately achieved. This eliminates guesswork and ensures joint integrity.
- High Performance Grades: Manufactured to performance grades 10.9 and 12.9s, offering superior tensile strength and fatigue resistance suitable for heavy-duty applications.
- Robust Specifications: Available in standard diameters from M16 to M30 (including M16, M20, M22, M24, M27, M30) with lengths ranging from 40mm to 220mm to accommodate various connection thicknesses.
- Enhanced Durability: Multiple surface treatment options including phosphating, galvanizing, blackening, and Dacromet coating provide excellent corrosion resistance for diverse environmental conditions.
- Simplified & Efficient Installation: The one-side tightening procedure (only on the nut side with a single washer) and the clear break-point indicator significantly reduce installation time, labor costs, and the need for specialized torque-measuring equipment.
- Stringent Quality Compliance: Products are strictly manufactured and tested in accordance with the Chinese National Standard GB/T 3632-2008 for “Sets of torshear type high strength bolt hexagon nut and plain washer for steel structures” and international standards such as ISO 898-1, ensuring traceable quality and global reliability.
Typical Applications
These bolts are the preferred choice for securing high-stress, vibration-prone connections in:
- Steel-framed buildings and skyscrapers
- Bridges and overpasses
- Transmission towers and electrical substations
- Industrial facilities and heavy machinery
- Stadiums and large-span structures
Post time: 2026-03-26 14:39:13
