Nylock Nuts
Nylock Nuts, also known as Nylon Insert Lock Nuts, are internally threaded fasteners featuring a nylon insert that grips the bolt threads, preventing loosening due to vibration, shock loads, and dynamic movement. These nuts provide high-torque resistance, secure fastening, and reusability, making them ideal for automotive, aerospace, heavy machinery, and industrial applications.
At Rajal Industries, we manufacture precision-engineered Nylock Nuts conforming to ISO, ASME, and DIN standards, ensuring optimal thread engagement, durability, and long-term performance.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Metric: M1.6 to M100 | ISO 2341 – Standard for self-locking nuts |
| Imperial: 1/4" to 1-1/2" | ASME B18.2.4.1 – American standard for nylon insert nuts |
| DIN 985 – German standard for prevailing torque type lock nuts | |
| ISO 7040 – International standard for hexagon nylon-insert nuts |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Carbon Steel & Mild Steel | Class 4, 5, 8, 10, 12 | ISO 7040, DIN 985, ASME B18.2.4.1 |
| Stainless Steel (Corrosion Resistant) | A2-70 (SS 304), A4-80 (SS 316) | ISO 3506 |
| Hardened Steel (High Tensile Strength) | Class 8, 10, 12 | ISO 2341, DIN 985 |
- Heat-Treated for Maximum Strength –Nylock nuts undergo quenching and tempering for superior load-bearing and anti-loosening performance.
- Load Ratings Based on Material & Application:
- Carbon Steel Class 8 Nylock Nut: 800-900 MPa tensile strength
- Stainless Steel A4-80 Nylock Nut: 700-800 MPa corrosion-resistant strength
Nylock Nut Design & Engineering Features
Nylon Insert for Secure, Self-Locking Grip
- The nylon collar deforms around the bolt threads, preventing loosening under vibration.
Creates resistance to unintentional back-off, making it ideal for dynamic applications.
Reusability & High Torque Resistance
- Can be installed and removed multiple times without losing its locking capability.
Reduces the need for thread-locking adhesives or additional fasteners.
Hexagonal Profile for High-Torque Applications
- Provides uniform load distribution and easy wrench application.
Available in standard and flanged designs for enhanced grip.
Available in Standard & Thin Variants for Versatile Use
- Standard Nylock Nuts (DIN 985, ISO 7040) – Used in high-load applications requiring strong vibration resistance.
Thin Nylock Nuts (Low-Profile) – Used where space constraints require a compact fastening solution.
Compatible with Various Bolt & Stud Types
- Hex Head Bolts, Threaded Rods & Studs – Ensures secure, high-strength fastening.
Structural & High-Tensile Bolts (ISO 4014, ASTM A325, DIN 6914) – Provides strong clamping force in critical applications.
Thread Specifications & Precision Engineering
| Thread Type | Description | Application |
|---|---|---|
| Coarse Thread (UNC/Metric) | Ensures fast engagement and strong grip | Automotive, machinery, heavy-duty applications |
| Fine Thread (UNF/Metric Fine) | Provides higher tensile strength & precise load transfer | Aerospace, railways, industrial equipment |
| Fully Threaded Nylock Nuts | Allows maximum engagement with bolts & studs | Construction, railway infrastructure |
| Partially Threaded Nylock Nuts | Offers better clamping force & vibration resistance | Power transmission, high-speed assembly |
Thread Fitment & Compliance
- Metric threads conform to ISO 6H tolerances, ensuring secure engagement and torque resistance.
- Imperial Nylock nuts meet ASME B18.2.4.1 and DIN 985 for universal compatibility.
Common Applications of Nylock Nuts
- Automotive & Heavy Machinery – Used in engine mounts, suspension systems, and chassis assemblies.
- Construction & Structural Engineering – Ensures secure fastening in bridges, steel structures, and power plants.
- Industrial Equipment & Machinery – Provides vibration-resistant fastening in turbines, compressors, and generators.
- Railway & Aerospace Engineering – Used in train couplings, aircraft panels, and satellite components.
- Renewable Energy & Wind Turbines – Fastens solar panel mounts, wind turbine structures, and electrical enclosures.
Why Choose Rajal Industries for Nylock Nuts?
Manufactured to International Standards
Ensuring precision engineering, strength, and compliance.
Self-Locking Nylon Insert for Maximum Vibration Resistance
Eliminates the need for additional locking mechanisms.
Customizable Variants Available
Offering standard, flanged, thin, and stainless steel Nylock nuts.
Bulk & Custom Orders
Ideal for automotive, construction, and industrial applications.
Stringent Quality Control
Each batch undergoes torque testing, thread fitment verification, and impact resistance checks.
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Our Offices
C-204, Vaibhav Platina, Nr. Kaveri Trishra, S P Ring road, Shilaj, Ahmedabad, Gujarat-380054
Call us
+91-846 036 2030
Email Us
rajalfast@gmail.com sales@rajalindustries.com