Torsion Shear Bolt for Steel Structure

Torsion Shear Bolt for Steel Structure

Torsion Shear Bolt for Steel Structure

Torsion shear bolt for steel structure, also widely called TC bolt (Tension Control Bolt) or twist-off high strength bolt, is a special preload structural fastener designed for slip-critical connections of steel engineering. It is supplied as a full assembly including bolt, heavy hex nut and flat washer, manufactured according to GB/T 3632-2008 standard, the most popular grade is 10.9S for steel construction projects.

Different from conventional large hex high-strength bolts which rely on manual torque testing, the torsion shear bolt features a spline tail with a pre-set shear neck. When tightening with a dedicated shear wrench, the spline will twist off automatically once the bolt reaches the designed pre-tension force. The broken tail is a clear visual signal that the bolt is correctly tightened, which removes human error, avoids under-tightening or over-tightening, and makes on-site inspection much simpler for engineers and contractors.

Key Advantages of Torsion Shear Bolt for Steel Structure

✅ Stable & Consistent Preload

Every bolt reaches the calibrated tension value, uniform load distribution on steel joints, great for seismic and wind-load projects.

✅ Visual Quality Control

Twist-off tail = qualified installation. No complicated torque record checking, saving inspection time on site.

✅ Fast Construction Speed

Simple one-step tightening, less training for workers, greatly shorten construction period for large steel structures.

✅ Excellent Mechanical Performance

Made of alloy steel, quenched and tempered. Grade 10.9S provides high tensile strength, good fatigue resistance for long-term heavy load service.

✅ Multiple Surface Treatment Options

Black oxide, phosphating, hot-dip galvanized (HDG), Dacromet coating available to meet different anti-corrosion requirements for indoor and outdoor steel projects.

Applications of steel structure torsional and shear bolts

High-rise steel frame buildings

Highway & railway steel bridges

Steel workshop, warehouse, industrial plant

Tower mast, power transmission steel structure

Large exhibition center, stadium steel roof

Heavy equipment steel support frame

We can produce hot dip galvanized torsion shear bolts to resist salt spray corrosion.We support non-standard drawing production, and accept third-party inspection before shipment.

If you are looking for reliable torsion shear bolt for steel structure for your steel construction project, welcome to send us your required size, grade, finish and quantity. We will offer competitive factory price and complete technical support.