| Attribute |
Details |
| Type |
Torsion Shear Bolts (Twist-off Bolts, Preload Control Bolts) |
| Material |
- Alloy Steel (ASTM A325, A490, Grade 10.9/12.9)
- Stainless Steel (316, A4-80) for Corrosive Environments |
| Finish |
- Zinc Plated (Yellow/White, RoHS/REACH Compliant)
- Hot-Dip Galvanized (ASTM A153, ISO 1461)
- Geomet Coating (Corrosion Resistance up to 1200 Hours) |
| Design |
- Split-Tip Shank with Predefined Break-off Notch
- Hex Head with Integral Washer
- Torque-Indicating Color Coding (for Preload Verification) |
| Thread Type |
- Metric (M16-M36, ISO 4017)
- Imperial (5/8"-1-1/2", UNC)
- Compliant with EN 14399-3/4 (Structural Bolts) |
| Length |
- Standard: 50mm–300mm (Metric); 2"–12" (Imperial)
- Custom Lengths Available for Specific Joint Thicknesses |
| Strength Grade |
- Grade 10.9 (Tensile Strength: 1000 MPa)
- Grade 12.9 (Tensile Strength: 1220 MPa)
- Stainless Steel: A4-80 (Tensile Strength: 800 MPa) |
| Standards Compliance |
- EN 14399-3/-4 (Eurocode Structural Bolts)
- ASTM A325M/A490M (Metric Structural Bolts)
- ISO 12944 (Corrosion Protection for Steel Structures) |
| Preload Control |
- Torque-Tension Relationship: Guaranteed Preload Accuracy via Break-off Notch
- Installation Tool Compatibility: Torsion Shear Wrenches (e.g., Hydraulic, Pneumatic) |
| Corrosion Resistance |
- Salt Spray Test: 1000+ Hours (Hot-Dip Galvanized/Geomet)
- UV-Resistant Coatings for Outdoor Use |
| Packaging |
- Bulk: Sealed Poly Bags in Heavy-Duty Cartons
- Palletized (with Protective Edge Guards for Logistics)
- Custom: Labeled Kits with Matching Nuts/Washers |
| Certifications |
- CE (EN 1090-1), ISO 3834
- Material Test Certificates (MTC) with Tensile Test Results
- Factory Production Control (FPC) Reports |
| Applications |
- Structural Steel Construction (Bridges, Stadiums, Industrial Buildings)
- Heavy Machinery, Wind Turbine Towers, Crane Rails
- Seismic-Resistant and High-Vibration Applications |
| Minimum Order Quantity (MOQ) |
500 Pieces (Standard Sizes); 1000 Pieces (Custom Grades/Coatings) |
| Delivery Time |
15–30 Days (Standard); 30–45 Days (Customized Orders with Testing) |
| Customization |
- Non-Standard Break-off Torque Values
- Custom Coating Thickness (e.g., 120μm for Marine Environments)
- Laser Engraving for Traceability |
- Precision Preload Control: The twist-off notch ensures consistent clamping force, eliminating guesswork in high-stress structural joints.
- Compliance with Global Standards: Meets EN 14399 (EU) and ASTM A325/A490 (North America) for seamless use in international projects.
- Corrosion-Resistant Solutions: Geomet and hot-dip galvanized finishes offer long-lasting protection in harsh climates, reducing maintenance costs.
- Efficient Installation: Compatible with automated torsion shear tools, speeding up assembly and minimizing human error in large-scale projects.
- Structural Integrity: Engineered for seismic and wind loads, ideal for critical infrastructure projects requiring high safety standards.
Need to emphasize compliance with Australian/New Zealand standards (AS/NZS 1252) or add fire-resistant coatings? Let me know!
JH Bolt Co., Ltd is a professional manufacturer of different types of bolts with more than 15 years rich manufacturer experience. The factory area is more than 1500 squares with more than hundreds different types ofnevproduction machines. There are more than 50 people who work here for at least 5 years.With quality &customer frst, staffs second, then company, Our products are widely recog-nized and trusted by users all over the world. Proft for the development of communication, We are here for you 12 hours a day, 7 days a week!
