- small screw,micro fastener,mini screw
- 0756-8586520
Jiali Locking Screws Vibration Resistance Test on Automotive ECU Modules
ZHUHAI JIALI HARDWARE CO., LTD.
Jiali Locking Screws Vibration Resistance Test on Automotive ECU Modules
Automotive Electronic Control Units (ECUs) operate in harsh environments — requiring resistance to -40°C to +125°C thermal cycling and high-frequency vibration. Jiali PMS-LK series locking screws feature a dual-thread + nylon insert composite structure, passing the full-cycle SAE J2334 vibration test on Bosch ECU modules.
1. Core Parameters (ISO 10664 + DIN 933-Nylon Patch)
| Size | Min. Locking Torque (N·m) | Max. Removal Torque (N·m) | Vibration Life (cycles) | Temp Range |
|---|---|---|---|---|
| M4×0.7 | 1.3–1.8 | ≥2.5 | ≥5×10⁶ | -40°C ~ +125°C |
| M5×0.8 | 2.0–2.8 | ≥3.8 | ≥5×10⁶ | -40°C ~ +125°C |
| M6×1.0 | 3.5–4.5 | ≥6.2 | ≥5×10⁶ | -40°C ~ +125°C |
2. Bosch ECU Validation (Report: SZ2026-LK-ECU-01)
• Standard: SAE J2334 (Automotive Component Vibration Test)
• Vibration Profile: Random (5–2000 Hz, PSD 0.04 g²/Hz, RMS acceleration 25g)
• Duration: 120 hours (equivalent to 10-year vehicle life)
• Results:
✓ Preload loss ≤ 3.2% (initial 1.6 N·m → final 1.55 N·m)
✓ Zero loosening, zero detachment, zero functional anomaly
3. Jiali PMS-LK Series Advantages
✓ Dual-locking: Torx drive + nylon insert (125°C rated, >10 reuses)
✓ Surface Finish: RoHS-compliant trivalent chromium (salt spray ≥1000h)
✓ 100% automated optical inspection: nylon integrity & thickness uniformity
✓ Customization: Non-standard lengths, special heads (hex flange/countersunk), laser marking
All Jiali locking screws undergo full-spectrum ISO 10664 & SAE J2334 testing. A Vibration