Vimal Industrial Corporation is a reputed supplier and stockist of DIN 985 nylon insert hex lock nuts in Mumbai, India. We offer premium-grade fastening solutions for clients across automotive, heavy equipment, construction, and power generation sectors. Our inventory includes a wide range of sizes, materials, and finishes—sourced from trusted brands like APL Fasteners—ensuring consistent quality and reliable performance.
DIN 985 lock nuts are engineered with a hexagonal profile and a pre-installed nylon insert, which deforms elastically to grip the bolt threads securely. This nylon insert acts as a vibration-resistant self-locking feature, minimizing the chances of the nut loosening due to movement, shock, or thermal expansion. Compared to standard nuts, DIN 985 provides superior joint integrity for dynamic or rotating assemblies while allowing for limited reusability without damaging the bolt threads.
With the growing need for anti-vibration and safety-locking fasteners, DIN 985 Nylon Insert Lock Nuts have become a popular choice across industries. Their ability to maintain preload and resist self-loosening makes them ideal for high-performance mechanical joints. The nylon insert conforms to the bolt thread without damaging it, ensuring a secure grip and minimizing risk of accidental loosening.
Vimal Industrial Corporation stocks and supplies DIN 985 nuts in both metric and imperial threads, with options for stainless steel, mild steel, and alloy materials. As a trusted supplier based in Mumbai, we cater to OEMs, industrial buyers, and construction contractors across India with prompt delivery and technical guidance.
DIN 985 lock nuts are best suited for assemblies requiring vibration resistance, torque stability, and safety locking without external washers or adhesives. The self-locking feature makes them versatile across numerous sectors.
Common Applications Include:
Automotive Assembly
Used in engine components, chassis connections, and suspension systems to resist vibrations.
Industrial Machinery
Ideal for rotating parts, motors, conveyors, and precision mechanical systems.
Construction & Infrastructure
Secures structural members, supports, and frameworks in dynamic load environments.
Aerospace & Defense
Lightweight locking solution for non-critical assemblies requiring vibration protection.
Electrical & Panel Installations
Provides secure fastening for enclosures, brackets, and control panels.
General Engineering
Trusted for any application needing reusable, anti-loosening threaded fasteners.
With decades of industry experience, Vimal Industrial Corporation is recognized for its quality-first approach, wide product range, and quick delivery across India. We supply DIN 985 nylon insert nuts that conform to DIN and ISO standards and meet the performance expectations of today’s demanding industries.
Why Our Customers Trust Us:
Whether you’re securing machinery, building infrastructure, or assembling electrical panels, our DIN 985 nuts deliver unmatched performance and peace of mind.
| Thread d | M3 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 | M18 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M8x1 | M10x1 | M12x1.5 | M14x1.5 | M16x1.5 | M18x2 | ||||||
| P | 0.5 | 0.7 | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 |
| da min. | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 14 | 16 | 18 |
| da max. | 3.45 | 4.6 | 5.75 | 6.75 | 7.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 19.5 |
| dw min. | 4.6 | 5.9 | 6.9 | 8.9 | 9.6 | 11.6 | 15.6 | 17.4 | 20.5 | 22.5 | 24.9 |
| e min. | 6.01 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 | 29.56 |
| h nominal=max | 4 | 5 | 5 | 6 | 7.5 | 8 | 10 | 12 | 14 | 16 | 18.5 |
| h min. | 3.7 | 4.7 | 4.7 | 5.7 | 7.14 | 7.64 | 9.64 | 11.57 | 13.3 | 15.3 | 17.66 |
| m min. | 2.4 | 2.9 | 3.2 | 4 | 4.7 | 5.5 | 6.5 | 8 | 9.5 | 10.5 | 13 |
| m′ min. | 1.65 | 2.2 | 2.75 | 3.3 | 3.85 | 4.4 | 5.5 | 6.6 | 7.7 | 8.8 | 9.9 |
| s nominal=max | 5.5 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 | 27 |
| s min. | 5.32 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | 26.16 |
| Weight (kg/1000pcs) | 0.5 | 1 | 1.4 | 2.4 | 3 | 5.1 | 10.6 | 17.2 | 26 | 34 | 45 |
| Thread d | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M20x2 M20x1.5 |
M22x2 M22x1.5 |
M24x2 | M27x2 | M30x2 | M33x2 | M36x3 | M39x3 | M42x3 | M45x3 | M48x3 | |
| P | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 |
| da min. | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 |
| da max. | 21.6 | 23.7 | 25.9 | 29.1 | 32.4 | 35.6 | 38.9 | 42.1 | 45.4 | 48.6 | 51.8 |
| dw min. | 27.7 | 29.5 | 33.2 | 38 | 42.7 | 46.6 | 51.1 | 55.9 | 60.6 | 64.7 | 69.4 |
| e min. | 32.95 | 35.03 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 72.09 | 76.95 | 82.6 |
| h nominal=max | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 |
| h min. | 18.7 | 20.7 | 22.7 | 25.7 | 28.7 | 31.4 | 34.4 | 37.4 | 40.4 | 43.4 | 46.4 |
| m min. | 14 | 15 | 15 | 17 | 19 | 22 | 25 | 27 | 29 | 32 | 36 |
| m′ min. | 11 | 12.2 | 13.2 | 14.8 | 16.5 | 18.2 | 19.8 | 21.5 | 23.1 | 24.8 | 26.5 |
| s nominal=max | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 |
| s min. | 29.16 | 31 | 35 | 40 | 45 | 46 | 53.8 | 58.8 | 63.8 | 68.1 | 73.1 |
| Weight (kg/1000pcs) | 65 | 75 | 100 | 162 | 212 | 317 | 415 | 499 | 628 | 771 | 998 |
Note: All the information provided on this website is provided on an “as is” and “as commonly used in production” basis and you agree that you use such information entirely at your own risk. This website gives no warranty and accepts no responsibility or liability for the accuracy or the completeness of the information and materials contained in this website. Under no circumstances will the website be held responsible or liable in any way for any claims, damages, losses, expenses, costs or liabilities whatsoever (including, without limitation, any direct or indirect damages for loss of profits, business interruption or loss of information) resulting or arising directly or indirectly from your use of or inability to use this website.
| Steel group | Steel grade | Strength class | Screws, Nuts and Bolts | |||
|---|---|---|---|---|---|---|
| Tensile strength (N/mm²) | Tensile strength (PSI) | Dia range | Nut Load (N/mm²) | |||
| Austenitic | A2 and A4 | 50 | 500 | 70,000 | ≤ M39 | 500 |
| 70 | 700 | 100,000 | ≤ M20 | 700 | ||
| 80 | 800 | 118,000 | ≤ M20 | 800 | ||
The tensile stress is calculated with reference to the tensile stress area (see DIN EN ISO 3506-1979). Nuts to be paired with same grade of stainless steel screws.
| Steel group | Property Strength class | Made From | Characteristics |
|---|---|---|---|
| Austenitic | 50 | A1, A2 | Soft; cold worked, turned and soft pressed fasteners |
| 70 | A2, A4 | Cold worked, normal strength formed fasteners | |
| 80 | A2, A4 | Extreme cold worked, high strength, special applications |
| Grade | USA Grade | Material designation | Material no. | Chemical Composition (%) | |||||
|---|---|---|---|---|---|---|---|---|---|
| C % | Si ≤ % | Mn ≤ % | Cr % | Mo % | Ni % | ||||
| A 2 | 304 | X 5Cr Ni 1810 | 1.4301 | ≤ 0.07 | 1.0 | 2.0 | 17.5 to 19.5 | - | 8.0 to 10.5 |
| X 2 Cr Ni 1811 | 1.4306 | ≤ 0.03 | 1.0 | 2.0 | 18.0 to 20.0 | - | 10 to 12.0 | ||
| X 8 Cr Ni 19/10 | 1.4303 | ≤ 0.07 | 1.0 | 2.0 | 17.0 to 19.0 | - | 11.0 to 13.0 | ||
| A 4 | 316 | X 5 Cr Ni Mo 1712 | 1.4401 | ≤ 0.07 | 1.0 | 2.0 | 16.5 to 18.5 | 2.0 to 2.5 | 10.0 to 13.0 |
| X 2 Cr Ni Mo 1712 | 1.4404 | ≤ 0.03 | 1.0 | 2.0 | 16.5 to 18.5 | 2.0 to 2.5 | 10 to 13 | ||
| PROPERTY CLASS | MATERIAL AND TREATMENT | CHEMICAL COMPOSITION LIMITS % | TEMPERING TEMP °C MIN. | |||
|---|---|---|---|---|---|---|
| C | P | S | ||||
| 4.6, 4.8, 5.8, 6.8 | Low or medium carbon steel | 0 – 0.55 | 0.05 | 0.05 | - | |
| 8.8 | Medium carbon steel quenched, tempered | 0.25 – 0.55 | 0.04 | 0.05 | 425 | |
| 9.8 | Medium carbon steel quenched, tempered | 0.25 – 0.55 | 0.04 | 0.05 | 425 | |
| 10.9 | Medium carbon steel additives e.g. boron, Mn, Cr or Alloy steel – quenched, tempered |
0.20 – 0.55 | 0.04 | 0.05 | 425 | |
| 12.9 | Alloy steel – quenched, tempered | 0.20 – 0.50 | 0.035 | 0.035 | 380 | |
| MECHANICAL PROPERTY | PROPERTY CLASS | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4.8 | 5.6 | 5.8 | 6.8 | 8.8 Up to M16 | 8.8 Over M16 | 9.8 | 10.9 | 12.9 | |
| Tensile Strength (Rm, N/mm²) nom. | 400 | 500 | 500 | 600 | 800 | 830 | 900 | 1000 | 1200 |
| Tensile Strength (Rm, N/mm²) min. | 420 | 500 | 520 | 600 | 800 | 830 | 900 | 1040 | 1220 |
| Vickers Hardness min. | 130 | 155 | 160 | 190 | 250 | 255 | 290 | 320 | 385 |
| Vickers Hardness max. | 250 | 250 | 250 | 320 | 336 | 360 | 380 | 380 | 435 |
| Brinell Hardness min. | 124 | 147 | 152 | 181 | 319 | 342 | 266 | 295 | 353 |
| Brinell Hardness max. | - | - | - | 238 | 365 | 319 | 342 | 363 | 412 |
| Rockwell Hardness min. HR | 71 | 79 | 82 | 89 | - | 20 | 23 | 28 | 32 |
| Rockwell Hardness min. HRC | - | - | - | - | 20 | 23 | 28 | 32 | 39 |
| Rockwell Hardness max. HRC | - | - | - | - | 32 | 34 | 37 | 39 | 44 |
| Yield Stress ReL. N/mm² nom. | 320 | 300 | 400 | 480 | - | 640 | 720 | 900 | 1080 |
| Yield Stress ReL. N/mm² min. | 340 | 300 | 420 | 480 | - | 640 | 720 | 940 | 1100 |
| Stress at permanent set limit N/mm² nom. | - | - | - | - | 640 | 720 | 900 | 1080 | 1200 |
| Stress at permanent set limit N/mm² min. | - | - | - | - | 640 | 660 | 720 | 940 | 1100 |
A DIN 985 Nylon Insert Hexagon Stop Lock Nut is a type of self-locking nut that features a nylon collar insert. This insert resists turning and loosening under vibration, making it ideal for applications where secure fastening is critical. It complies with DIN 985 standards for precision and durability.
DIN 985 nylon insert lock nuts are widely used in the automotive, machinery, aerospace, and construction industries. Their vibration-resistant design makes them perfect for dynamic assemblies, ensuring long-lasting performance in critical load applications.
DIN 985 lock nuts are available in carbon steel, stainless steel (A2-70, A4-80), and zinc-plated or galvanized finishes. These materials meet different strength grades such as 8.8, 10.9, and 12.9, offering options for both general-purpose and high-performance applications.
A2 stainless steel (304 grade) offers excellent corrosion resistance and is ideal for indoor and mildly corrosive environments. A4 stainless steel (316 grade) contains molybdenum, providing superior resistance to saltwater and aggressive chemicals—perfect for marine and chemical industries.
Compared to spring washers or standard hex nuts, DIN 985 nylon insert lock nuts offer better resistance to loosening under vibration and dynamic loads. Their nylon insert acts as a positive lock, making them more reliable for safety-critical and high-vibration applications.
