Tension Control Bolts
High-Strength Preloaded Fasteners for Structural Connections
Tension Control Bolts (TC Bolts) are advanced high-strength fasteners designed for structural steel applications requiring consistent and reliable tensioning. These bolts are commonly used in construction projects such as bridges, steel buildings, towers, and other critical frameworks. Engineered with a spline end, TC bolts are installed using a shear wrench that automatically applies the correct tension by snapping off the spline when the required load is achieved.
Manufactured to meet international standards including ASTM A325, ASTM A490, and EN 14399-10, TC bolts are supplied pre-assembled with a washer and nut to ensure quick and efficient installation on-site.
Bolt Type: Tension Control Bolt (TC Bolt)
Head Style: Round head with spline drive
Material Grades: ASTM A325, A490, EN 14399-10, ISO 898-1
Finish Options: Black, Zinc-plated, Hot Dip Galvanized
Sizes: M16 to M30 (Imperial sizes also available)
Supplied complete with nut and washer
Compatible with standard shear wrenches
Specification | Details |
|---|---|
Diameter Range | M16 – M30 / 5/8” – 1-1/4” |
Length Range | 40mm – 300mm |
Thread Type | Metric (ISO Standard) |
Coating Options | HDG, Phosphate, Zinc, Black Oxide |
Tensile Strength | Grade 8.8 / 10.9 |
Installation Method | Shear Wrench |
Compliance Standards | ASTM A325 / A490, EN 14399-10 |
Steel bridges
High-rise buildings
Stadiums and towers
Structural steel fabrication
Infrastructure and transport projects
Ensures uniform preload across all connections
Fast and reliable installation with shear wrench
Tamper-resistant once installed
Supplied pre-assembled, reducing labor time on-site
Suitable for high-load and seismic applications
What is a Tension Control Bolt used for?
Tension Control Bolts are used in structural steel connections where consistent and reliable preload is critical, such as in bridges and multi-story buildings.
How is a TC Bolt installed?
TC Bolts are installed using a shear wrench. The wrench applies torque until the spline shears off, ensuring the bolt has reached the correct tension.
What standards do TC Bolts comply with?
They comply with ASTM A325, ASTM A490, and EN 14399-10 standards, ensuring high performance in structural applications.
Are nuts and washers included with the bolts?
Yes. Each TC Bolt is supplied pre-assembled with a matching nut and washer.
Can I order custom sizes or coatings?
Yes. Custom dimensions, grades, and coatings (HDG, black, zinc) are available upon request for project-specific requirements.