🔩 Metal Lock Nut (All-Metal Self-Locking Nut) – Vibration-Resistant & High-Temperature Locking Nut | Neo Fasteners
Metal Lock Nuts, also known as All-Metal Lock Nuts, are self-locking nuts that do not use nylon inserts. Instead, they achieve locking action through their mechanical design, such as deformed threads, oval shapes, or slotted crowns. This design allows them to withstand extreme temperatures, corrosive environments, and high-vibration conditions, making them ideal for critical applications in automotive, aerospace, railway, energy, and industrial machinery.
Unlike nyloc nuts, metal lock nuts can be used in high-temperature environments, typically up to 500°C and beyond, and are also fully reusable in most cases.
✅ Key Features
- 100% metal construction – no nylon or plastic
- Self-locking mechanism – prevents loosening from vibration or torque
- Suitable for high-temperature and harsh industrial environments
- Available in prevailing torque type or locking flange type
- Reusable multiple times with reliable performance
- No risk of nylon degradation or melting
🛠️ Types of All-Metal Lock Nuts Offered by Neo Fasteners
-
Prevailing Torque Type (DIN 980 / DIN 982M)
- Locking achieved via distorted threads at the top
- Commonly used with high-tensile bolts
-
Top Lock Nuts (DIN 980V)
- Slightly elliptical top for thread interference fit
- Secure and reusable
-
Stover Lock Nuts / Conical Lock Nuts
- Conical top for torque control
- Widely used in truck wheels and industrial applications
-
Flange Lock Nuts (DIN 6927)
- Serrated flange for vibration resistance and surface grip
-
Two-Piece Lock Nuts
- Metal insert for superior locking strength
-
Slotted Lock Nuts / Castle Nuts
- Used with cotter pins in rotating parts like axles
📏 Available Sizes – Metric and Inch
| Metric Sizes | Inch Sizes |
|---|---|
| M3 to M36 | 1/8" to 1-1/2" |
| UNC / UNF | Available |
Custom sizes and thread pitches available on request.
🧱 Material Options
- High Tensile Steel (8 / 10 Grade) – For structural & automotive use
- Stainless Steel (SS 304 / SS 316) – Marine, food-grade, and corrosion-prone areas
- Carbon Steel – Economical general-use option
- Brass – On demand for decorative or conductive applications
- Alloy Steel with Heat Treatment – For aerospace and critical load applications
🎨 Finishes & Coatings
| Finish | Features |
|---|---|
| Zinc Plated (White / Yellow) | Corrosion resistance for general use |
| Hot Dip Galvanized (HDG) | Heavy-duty rust protection, ideal for outdoor use |
| Black Oxide | Anti-corrosive, industrial appearance |
| Geomet / Dacromet | Eco-friendly, salt-spray resistant |
| Self-Color / Plain | For secondary processing |
📐 Standards Followed
- DIN 980 / DIN 982 / DIN 6927 / ISO 7042 / ISO 7719
- ASME B18.16.6 / IFI-100 / IFI-107 (Inch/UNC)
- ISO 9001:2015 Certified Production
- RoHS Compliant – Free of hazardous substances
🧰 Applications
- Automobile wheels, engines, exhaust systems
- Railways, aerospace, and defence equipment
- Wind turbines, solar panels, heavy equipment
- High-vibration environments like motors and pumps
- Boilers, furnaces, high-temp industrial processes
- Bridges, cranes, mining, oil & gas platforms
📦 Packing Details
- Polybag packs: 50 / 100 pcs
- Bulk cartons: 10 kg / 25 kg
- Palletized packaging available for exports
- Material Test Certificate (MTC) & RoHS Certificate available on request
📞 Contact Neo Fasteners
📧 Email: neofasteners@yahoo.com
📞 Call/WhatsApp: +91-96328 07665
🌐 Websites:
📍 Location: Bengaluru, Karnataka, India