DIN 934 is a German industrial standard that specifies hexagon nuts’ dimensions, materials, mechanical properties, and marking requirements. This standard applies to various applications and ensures the nuts’ interchangeability and reliability.
Field of application
DIN 934 outlines the requirements for hexagon nuts ranging from M1 to M60. Nuts are classified into product grade A for sizes up to M16 and product grade B for sizes above M16. If special cases require nuts to meet specifications outside this standard, they should be chosen based on the relevant standards.
DIN 934 Technical Delivery Conditions
| Material | Steel | Stainless steel | Non-ferrous metals | |
| General requirements | As specified in DIN 267 Part 1. | |||
| Thread | Tolerance | 6H (1) | ||
| As specified in | DIN 13 Parts 12 and 15. | |||
| Mechanical properties | Property Class (material) | For size M2,5 or less: 6; for sizes between M3 and M39: 6,8 or 10 for sizes above M39: subject to agreement | For sizes up to M39: A2-70 or A4-70 for sizes above M39: subject to agreement. | Subject to agreement. |
| As specified in | DIN 267 Part 4 | DIN 267 Part 11 | DIN 267 Part 18 | |
| Limit deviations, geometrical tolerances | Product grade | For sizes up to M16:A; for larger size:B. | ||
| As specified in | ISO4759 Part 1. | |||
| Surface finish | As processed | Bright. | Bright. | |
| DIN 267 Part 2 shall apply with regard to surface roughness, DIN267 Part 20 shall apply with regard to permissible surface discontinuities. DIN 267 Part 21 shall apply with regard to the widening test. DIN 267 Part 9 shall apply with regard to electroplating. I) DIN 267 Part 10 shall apply with regard to hot dip galvanizing. | ||||
| Acceptance inspection | DIN 267 Part 5 shall apply with regard to acceptance inspection. | |||
| (1)Where a protective coating is applied, e.g., an electroplated coating complying with DIN 267 Part 9, depending on the coating thickness required, it may be necessary, particularly in the case of tolerance class 6H nuts, to select a larger fundamental deviation than that assigned to the H position (see DIN 267 Part 9). This, however, might Impair the resistance of the bolt/nut assembly to stripping. | ||||
Din 934 Designation
| Designation | Description |
| M12 Chamfered Hexagon Nut (Property Class 8) | Hexagon nut DIN 943-M12-8 |
| Product Grade A (for sizes M16 or more) | Hexagon nut DIN 934-M20-8-A |
| With Radiused Edges (Gr) | Hexagon nut DIN 934-M110×6-8-Gr |
| Free Cutting Steel | Hexagon nut DIN 934-M12-6AU (AU added for property class) |
| Designation of Designs and Types | DIN 962 applies, with additional details when ordering |
| Tabular Layout of Article Characteristics | Applies per DIN 4000-2-7 for nuts covered in this standard |
Mass of Din 934 Hexagon Nusts
The values of mass given for steel nuts are for guidance only.
| Thread size (d) | M1 | M1.2 | M1.4 | M1.6 | M2 | M2.5 | M3 | M3.5 | M4 |
| Mass(7,85kg/dm³), for 1000 units, in kg ≈ | 0.030 | 0.540 | 0.063 | 0.076 | 0.142 | 0.280 | 0.384 | 0.514 | 0.81 |
| Thread size (d) | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 | M18 |
| Mass(7,85kg/dm³), for 1000 units, in kg ≈ | 1.23 | 2.50 | 3.12 | 5.20 | 11.60 | 17.30 | 25.00 | 33.3 | 494 |
| Thread size (d) | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 |
| Mass(7,85kg/dm³), for 1000 units, in kg ≈ | 644 | 79 | 110 | 165 | 223 | 288 | 393 | 502 | 652 |
| Thread size (d) | M45 | M48 | M52 | M56 | M60 | M64 | M68 | M72x6 | M76x6 |
| Mass(7,85kg/dm³), for 1000 units, in kg ≈ | 800 | 977 | 1220 | 1420 | 1690 | 1980 | 2300 | 2670 | 3040 |
| Thread size (d) | M80x6 | M85x6 | M90x6 | M100x6 | M110x6 | M125x6 | M140x6 | M160x6 | |
| Mass(7,85kg/dm³), for 1000 units, in kg ≈ | 3440 | 3930 | 4930 | 6820 | 8200 | 13000 | 17500 | 26500 |
Approximately the same values of mass may be assumed for fine pitch nuts.
DIN 934 Marking
The specifications given in DIN 267 Parts 4,11, and 18 shall apply for the marking of nuts.
Nuts manufactured by machining of property classes above 6 as specified In DIN 267 Part 4, shall only be marked subject to a particular agreement.
Products of Din 934 Hexagon Nusts
SSM provides DIN 934 hexagon nuts in Carbon Steel, Stainless Steel, and Nickel Alloys. These materials are suitable for various applications and meet a range of environmental and performance requirements.
- Material: Carbon steel, often treated for corrosion resistance.
- Sizes: Available in various sizes, commonly from M1 to M60.
- Finish: This may come in plain, zinc-plated, or other coatings for enhanced protection.
- Class:6,8,10
- Material: Typically made from austenitic stainless steel grades such as 304 or 316, offering excellent corrosion resistance.
- Sizes: Available in various sizes, commonly ranging from M1 to M60.
- Finish: Usually comes in a natural finish but may also be passivated or coated for additional protection.
- Material: Typically made from nickel alloys such as Inconel or Hastelloy, known for their exceptional resistance to oxidation and corrosion.
- Sizes: Available in various sizes, commonly from M1 to M60.
- Finish: Often provided in a natural finish, but may also be coated for enhanced protection against aggressive environments.
Applications of Din 934 Hexagon Nuts
DIN 934 hexagon nuts are widely used in various industries due to their versatility and reliability. Common applications include:
- Construction: Used to secure structural components, including beams, columns, and brackets.
- Machinery: Essential for fastening parts in machines and equipment, ensuring stability and safety.
- Automotive: Commonly found in vehicles for assembling engines, chassis, and other critical components.
- Aerospace: Used in aircraft assembly and maintenance for strength and corrosion resistance.
- Oil and Gas: Employed in piping systems, valves, and fittings to withstand harsh environmental conditions.
- Electrical: Used in electrical installations for securing components and ensuring proper grounding.
Their compatibility with various materials and resistance to corrosion make DIN 934 hexagon nuts suitable for numerous applications across multiple sectors.
Advantages & Disadvantages of Din 934 Hexagon Nuts
The advantages of DIN 934 hexagon nuts include their wide applicability, meeting various needs across industries while providing strong and stable connections. They are available in multiple material options (such as carbon steel, stainless steel, and nickel alloys) to address different environmental and strength requirements. Additionally, their standardization ensures compatibility and interchangeability with other fasteners.
However, DIN 934 hexagon nuts also have some disadvantages. They may be heavier in certain applications than other lightweight fastening solutions, and specific torque settings are needed during installation to prevent loosening. High-quality materials, especially stainless steel, and nickel alloys can be more expensive and may not be ideal for extremely high-load applications. Furthermore, even coated or stainless steel options may corrode in harsh environments if not properly selected.
FAQ
Selection should be based on the application requirements, including load capacity, environmental conditions, and material compatibility.
Stainless steel and nickel alloy options offer excellent corrosion resistance, while carbon steel may require coatings to protect against rust.
Generally, hexagon nuts can be reused if they are in good condition, but it’s important to check for wear or damage before reinstallation.
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