DIN NUTS

DIN 934 | DIN 439 | DIN 6923 | DIN 980 | DIN 985 | DIN 6334

Manufacturer & Exporter – Super Industries India

1. Introduction to DIN Nuts

DIN Nuts are essential fastening components designed to work in combination with bolts, screws, and studs to create secure mechanical joints. Governed by German DIN standards, these nuts ensure consistent dimensions, reliable load distribution, and safe performance across global industrial applications.

At Super Industries India, we manufacture and export a complete range of DIN standard nuts, including hex nuts, flange nuts, jam nuts, heavy hex nuts, and self-locking nuts, suitable for structural, pressure, and dynamic load environments.

2. Role of Nuts in Fastening Systems

Nuts serve several critical engineering functions:

• Convert torque into axial clamping force
• Maintain joint integrity under vibration
• Allow controlled disassembly
• Distribute load across mating surfaces

Proper nut selection directly impacts joint strength, fatigue life, and safety.

3. DIN 934 – Hexagon Nuts

Definition

DIN 934 specifies standard hexagon nuts with metric coarse and fine threads.

Key Characteristics

• Six-sided hex shape
• Easy tool access
• Compatible with DIN 931 / DIN 933 bolts

Applications

• Structural steel
• Machinery assembly
• Automotive components
• General engineering

ISO / ASTM Equivalents

• ISO 4032
• ASTM A563

4. DIN 439 – Hexagon Thin Nuts (Jam Nuts)

Definition

DIN 439 covers thin hexagon nuts, commonly used as lock nuts.

Key Features

• Reduced height
• Used in pairs or as secondary locking
• Suitable for limited space

Applications

• Precision equipment
• Adjustment mechanisms
• Locking assemblies

5. DIN 6923 – Hexagon Flange Nuts

Definition

DIN 6923 specifies hex nuts with an integrated flange, eliminating the need for washers.

Advantages

✔ Better load distribution
✔ Faster installation
✔ Improved resistance to loosening

Applications

• Automotive assemblies
• Sheet metal connections
• Structural frames

6. DIN 980 – All-Metal Self-Locking Nuts

Definition

DIN 980 specifies prevailing torque nuts with a deformed metal locking section.

Key Benefits

• High vibration resistance
• Suitable for high temperatures
• No nylon insert

Common Uses

• Aerospace
• Heavy machinery
• High-vibration environments

7. DIN 985 – Nylon Insert Lock Nuts

Definition

DIN 985 covers hex nuts with nylon insert (Nyloc nuts).

Advantages

• Excellent vibration resistance
• Reusable to a limited extent
• Economical locking solution

Limitations

• Temperature restricted
• Not suitable for very high heat

8. DIN 6334 – Heavy Hex Nuts

Definition

DIN 6334 specifies heavy hex nuts with increased thickness for high-strength applications.

Typical Applications

• Structural steel joints
• Wind turbines
• Bridges
• High-load machinery

9. Comparison of Common DIN Nuts

DIN Standard	Type	Locking Feature	Typical Use
DIN 934	Hex nut	None	General
DIN 439	Thin nut	Secondary locking	Precision
DIN 6923	Flange nut	Load distribution	Automotive
DIN 980	All-metal lock	Prevailing torque	High vibration
DIN 985	Nylon insert	Nylon ring	Medium vibration
DIN 6334	Heavy hex	None	Structural

10. Materials Offered by Super Industries India

Carbon Steel

• C35 / C45
• ASTM A563

Alloy Steel

• ASTM A194 2H
• ASTM A194 7

Stainless Steel

• AISI 304
• AISI 316

Special Materials

• Duplex Stainless Steel
• Inconel
• Monel

11. Mechanical Property Classes

Property Class	Application
4	Light duty
8	Medium load
10	Heavy load
12	High-strength

12. Manufacturing Process

1️⃣ Raw material cutting
2️⃣ Hot / cold forging
3️⃣ Thread tapping
4️⃣ Heat treatment
5️⃣ Surface finishing
6️⃣ Quality inspection

13. Surface Finishes Available

• Plain / Black
• Zinc plated
• Hot dip galvanized
• Phosphate & oil
• PTFE coating

14. Quality Assurance & Testing

✔ Dimensional checks
✔ Thread gauge inspection
✔ Hardness testing
✔ Proof load testing
✔ EN 10204 3.1 certification

15. Packaging & Export

• Bulk packing
• Boxed packing
• Palletized export shipments
• Customized labeling

16. Why Choose Super Industries India for DIN Nuts?

✔ Manufacturer & exporter
✔ DIN / ISO / ASTM compliance
✔ Custom sizes & materials
✔ Competitive pricing
✔ Global delivery

17. FAQs – DIN Nuts

Q1: What is the difference between DIN 980 and DIN 985?
DIN 980 is all-metal locking; DIN 985 uses a nylon insert.

Q2: Can you supply heavy hex nuts?
Yes, DIN 6334 heavy hex nuts are available.

Q3: Do you manufacture custom nuts?
Yes, based on drawings or samples.

18. Request a Quote

For DIN standard nuts, contact:

📧 sales@superindustriesindia.in