Welcome: JIA LI INDUSTRIAL (H.K.) LIMITED
Language:
∷
∷
∷
Hard-Lock from Japan owns exclusive two-piece offset wedge tooth all-metal self-locking patent. Different from nylon lock nuts and single-piece deformed metal nuts, it maintains stable preload from -60℃ to 180℃ without nylon melting failure, becoming the top imported anti-loosening nut for high-vibration export equipment including high-speed rail, wind towers and mining vehicles. Fastener_hk stocks genuine original Hard-Lock products in Hong Kong warehouse.
| Comparison Item | Genuine Japanese Hard-Lock Lock Nut | Standard Nylon Insert Lock Nut | Domestic Single-piece Thread Deformed Metal Nut |
| Core Anti-loosening Structure | Two interlocked wedge tooth pieces, self-tighten under vibration | Nylon ring interference extrusion on threads | Local deformation of internal thread on single nut |
| Max Vibration Resistance | Up to 15G alternating impact vibration | Within 3G mild static vibration only | 6G medium vibration, preload fades after long operation |
| Stable Operating Temperature Range | -60℃ ~ 180℃, zero failure risk | -20℃ ~ 100℃, nylon melts above limit temp | -40℃ ~ 120℃, thread relaxation under high temperature |
| Allowable Reassembly Times | 10-15 times for heavy load, stable within 20 times for maintenance | Single use only, nylon fails after disassembly | Locking force drops sharply after 3-5 disassembly cycles |
| Overseas Engineering Recognition | Designated inspection-exempt brand for wind power, rail & heavy machinery supervisors | Only for indoor static equipment, banned for heavy industry projects | Not accepted by European & American high-end export projects, fails factory audit |
1. Pair assembly rule: Main nut and wedge auxiliary nut must be fitted with tooth surfaces attached; single piece assembly is forbidden; 2. Torque control rule: Increase tightening torque by 20% above bolt standard torque for full wedge tooth engagement; 3. Matching taboo: Do not stack with NORD-LOCK wedge washers, dual wedge structures counteract locking performance; 4. Material selection: Galvanized carbon steel for inland normal temp equipment, SUS316 stainless steel for coastal offshore high salt mist projects.
1. Genuine identification: Original nuts carry clear laser Hard-Lock logo on end face, counterfeits have blurry marking and rough tooth machining; 2. Customs declaration: Truthfully fill overseas brand Hard-Lock, provide Japanese original agency authorization to avoid IP inspection detention; 3. Factory audit documents: Original Japanese material certificate, vibration mechanical test report and RoHS environmental certificate attached per batch; 4. Replacement ban: Domestic metal lock nut substitution is forbidden if drawings specify Hard-Lock, which leads to equipment loosening and project acceptance failure.
Contact: Sunrise
Phone: 13928071304
Tel: +86-0756-8586520
Email: sales@zhjiali.com
Add:
