Tang Thread: Structural Innovation Against Loosening

Over 60% of mechanical failures are directly linked to thread loosening. Traditional methods like spring washers, lock nuts, and adhesives rely on external forces or chemicals, leading to wear, aging, and difficult disassembly. Tang Thread offers a passive, structure-based anti-loosening solution with exceptional reliability under harsh conditions.

1. Core Structure: Dual Thread Directions

Tang Thread features a unique design with a right-hand thread near the head and a left-hand thread near the tail. A right-hand nut and a left-hand nut are assembled accordingly, creating mutual compression and opposing torques that lock axial movement.

2. Anti-Loosening Principle: Torque Cancellation

During vibration, if the right-hand nut tends to loosen, the left-hand nut exerts opposing force, and vice versa. This bidirectional self-locking requires no friction or external aids, maintaining effectiveness from -50°C to high temperatures without aging or fatigue.

3. Key Advantages

• Higher Reliability: Retains over 95% preload after 100,000 hours of 10Hz vibration.

• Easy Reusability: No special tools needed; disassembly is 30% faster with no thread wear.

• Broad Compatibility: Available from M3 to M64 in carbon steel, stainless steel, and titanium alloys.

• Lower Cost: Reduces part inventory and labor; 15–20% total cost savings.

4. Typical Applications

• Automotive: Engine, transmission, chassis – failure rate dropped from 0.8% to 0.03%.

• Wind Power: Tower and blade joints – service life extended from 3 to 8+ years.

• Construction Machinery: Hydraulic systems – maintenance frequency reduced by 40%.

• Rail Transit: Track fasteners and body joints – zero loosening failures reported.

• Electronics: Miniature screws – contamination-free and maintenance-friendly.

5. Selection & Installation

• Thread precision: 6H/6g. Surface coating: ≥500h salt spray resistance.

• Choose 8.8/10.9/12.9 grade based on static or dynamic loads.

• Assembly sequence: tighten right-hand nut first (standard torque), then left-hand nut (80–90% of main torque).

6. Trends: Customization & Lightweighting

Custom pitches and transitions for thin-wall or special joints. Lightweight designs using high-strength alloys for EVs and aerospace.

Tang Thread redefines thread loosening prevention through pure structural innovation — reliable, convenient, and cost-effective. For fastener professionals, mastering this technology opens new opportunities and delivers superior solutions.