LONGZE high-performance ASME B18.16.6 Prevailing Torque Hex Nuts are precision-engineered all-metal locking solutions designed for high-temperature and high-stress industrial environments. As a cornerstone of the innovative LONGZE GFM-WCR System, these nuts utilize advanced top-deflection locking technology to ensure consistent prevailing torque and exceptional vibration resistance without relying on non-metallic inserts, making them ideal for heavy machinery and energy sector applications.
Our manufacturing process ensures strict adherence to ASME B18.16.6 specifications, providing a robust fastening solution that maintains structural integrity under extreme conditions. By integrating an engineering standard mapping layer (ASME ➔ DIN ➔ ISO), LONGZE provides global compatibility and seamless technical alignment, ensuring that every fastener delivered meets the most rigorous international quality and safety benchmarks.
Detailed Parameters
| Size Range | 1/4" to 1-1/2" | Material Grades | Grade B, C, G |
|---|---|---|---|
| Compliance Standards | ASME B18.16.6 | DIN | ISO | Locking Mechanism | All-Metal Deflection |
| Surface Treatments | Zinc Plated / Zinc Flake / Phosphate | Plating Standards | ASTM B633 / ISO 10683 |
| Thread Types | UNC / UNF (Imperial) | Hardness Testing | Rockwell C / Vickers |
| Quality Certification | Full MTC 3.1 / ISO 16228 | Reuse Cycle | Up to 5 cycles (per ISO 2320) |
Key Advantages
All-Metal Integrity
Eliminates non-metallic inserts, ensuring stability in extreme heat and corrosive industrial environments.
Vibration Resistance
Top-deflection technology provides superior prevailing torque to prevent loosening in high-vibration zones.
Global Standardization
Precise mapping across ASME, DIN, and ISO standards for worldwide engineering compatibility.
Precision Engineering
Manufactured to tight dimensional tolerances ensuring a perfect fit for imperial structural bolts.
Traceable Quality
Batch-coded traceability from the raw steel coil to the final inspection report (MTC 3.1).
Risk Mitigation
Strict proof load and removal torque verification protocols to eliminate fastening failures.
Product Gallery
Management Platforms
Material Buffer
Strategic inventory of high-grade alloy and carbon steel to ensure rapid lead times.
Automated Production
High-speed tapping and deflection assembly lines for consistent volumetric output.
QC Lab Testing
Rigorous torque and hardness verification per ASME B18.16.6 and ISO 2320.
Redundancy System
Certified secondary heat treatment partners to guarantee supply chain resilience.
Logistics Security
Moisture-resistant packaging with full photographic loading evidence for every container.
Red-Line Policy
100% replacement guarantee for any deviation from the signed TDS or PI.
Investment Return Comparison
| Performance Metric | Standard Lock Nuts | LONGZE GFM-WCR System |
|---|---|---|
| Temperature Limit | Limited by polymer inserts | High-temp all-metal stability |
| Vibration Security | Variable torque decay | Consistent prevailing torque |
| Reuse Capability | Often single-use | Up to 5 secure cycles |
| Compliance Risk | General industrial grade | ASME/DIN/ISO mapped precision |
| Maintenance Cost | Frequent replacement | Extended service life/Low failure |
Frequently Asked Questions
ASME B18.16.6 focuses on imperial dimensions and specific all-metal deflection types, whereas ISO 7042 is the metric counterpart. Both are designed to ensure high-vibration security using prevailing torque.
According to ASME B18.16.6 and ISO 2320, these nuts are designed to maintain their locking torque for up to 5 cycles, although new installation is recommended for safety-critical joints.
We offer Zinc Plating (ASTM B633), Zinc Flake (ISO 10683), and specialty Phosphate or Waxing treatments depending on the environmental requirements.
Yes. Because our prevailing torque nuts are "all-metal," they do not contain nylon or plastic inserts that melt, making them ideal for high-thermal industrial applications.
Every batch undergoes rigorous testing including first and fifth removal torque verification, proof load testing per ASTM A563, and full chemical analysis provided via MTC 3.1 certifications.
Yes, we provide full drawing support. You can send your technical assembly requirements to our engineering team for an optimized locking solution tailored to your specific needs.
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