High Strength Full Thread Studs China Factory and Suppliers DIN 976 ASTM A193 B7
Longze Full Thread Studs, also recognized as Threaded Rod Bolts or All-Thread, are precision-engineered high-strength structural fasteners designed for the most demanding industrial environments. Manufactured in strict accordance with DIN 976, ASME B18.31.2, and ASTM A193 standards, these studs provide continuous threading from end to end. This design ensures maximum nut engagement and highly adjustable clamping lengths, making them indispensable for heavy-duty flange piping, mechanical assembly, and large-scale construction projects.
Engineered specifically for high-pressure and extreme temperature applications, our full thread studs are available in a wide array of premium materials, including Alloy Steel (ASTM A193 B7) for high-heat oil and gas operations and Stainless Steel (B8/B8M) for corrosive marine or chemical settings. By eliminating the traditional bolt head, Longze studs provide uniform stress distribution and superior structural integrity, ensuring safety and reliability in critical infrastructure components.
Detailed Parameters
| Technical Standards | DIN 976 (Metric) / ASME B18.31.2 (Inch) | Material Grades | ASTM A193 B7, B8, B8M / ASTM A320 L7 |
|---|---|---|---|
| Metric Size Range | M6 to M100 | Inch Size Range | 1/4" to 4" |
| Temperature Range | -196°C to 800°C (Grade Dependent) | Thread Type | Continuous Full Threading |
| Surface Finishes | Plain, Zinc Plated, HDG, Xylan/PTFE | End Treatment | Precision-Chamfered Ends |
| Certification | ISO 9001 / MTC EN 10204 3.1 | Identification | Custom Grade End-Stamping (e.g., "B7") |
Key Advantages
High-Pressure Performance
Optimized for pressure vessels and valves where uniform thread engagement is critical for operational safety.
Thermal Stability
ASTM A193 B7 and B8/B8M materials maintain structural integrity in extreme heat or cryogenic conditions.
Uniform Stress Distribution
Continuous threading eliminates the weak points of bolt heads, providing balanced load distribution.
Rapid Assembly
Precision-chamfered ends prevent cross-threading and ensure smooth nut starting during fast installation.
Customizable Lengths
Easily cut to job-site requirements while maintaining full load-bearing capacity along the entire length.
Full Traceability
ISO 9001 certified production with complete material certificates (MTC) for safety compliance.
Product Gallery
Management Platforms
Material Selection
Wide range of alloy and stainless steels to match specific tensile strength and ductility needs.
Precision Manufacturing
Strict adherence to international tolerances for 100% compatibility with standard nuts.
Coating Engineering
Specialized PTFE and HDG coatings to extend service life in offshore and chemical environments.
Quality Inspection
Ultrasonic and Hardness testing to ensure zero internal defects in high-diameter B7/L7 materials.
Global Logistics
Fumigation-free pallets and heavy-duty protective tubes for secure international shipping.
Technical Support
Expert guidance on nut pairing (e.g., Grade 2H) and proper tensioning techniques.
Investment Return Comparison
| Feature | Standard Threaded Rod | Longze Full Thread Studs |
|---|---|---|
| Material Quality | Commercial Grade Carbon Steel | Certified ASTM A193/A320 Grades |
| Thread Precision | General Purpose | High-Precision DIN/ASME Standards |
| Corrosion Resistance | Basic Zinc/Plain | Advanced PTFE/Xylan/HDG Options |
| Load Capacity | Standard Tensile | Ultra-High Strength / Torque Rated |
| Service Life | Short to Medium | Long-term Industrial Durability |
Frequently Asked Questions
Longze DIN 976 studs are professional cut-to-length fasteners with specific chamfered ends and certified material grades, whereas general "threaded rod" often refers to bulk lengths of lower-grade carbon steel without strict industrial certifications.
Standard B7 studs are rated down to -29°C. For cryogenic or lower temperature services, we recommend ASTM A320 L7 studs, which undergo impact testing to ensure safety in extreme cold.
For optimal performance and safety, ASTM A193 B7 studs should always be paired with ASTM A194 Grade 2H heavy hex nuts to match the strength and temperature ratings of the stud.
PTFE/Xylan coatings provide low friction and superior corrosion resistance (1000h+ salt spray). This prevents threads from "freezing" in offshore or chemical environments, allowing for easier maintenance.
We offer a comprehensive range including Metric sizes from M6 to M100 and Inch sizes from 1/4" to 4", catering to both small-scale machinery and massive structural piping.
Yes. For marine applications, we recommend ASTM A193 B8M (316 Stainless Steel) or Hot-Dip Galvanized (HDG) coatings to ensure maximum resistance against saltwater corrosion.
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