Basic Specifications
- Common Standards: DIN 6334 / DIN 934 (Extended Type)
- Product Types: Full-length internal thread, internal thread on both ends (with through-hole in the middle)
- Thread Sizes: M4 / M5 / M6 / M8 / M10 / M12 / M14 / M16 / M20 / M24
- Thread Types: Both coarse and fine metric threads available
- Thread Tolerance: 6H
- Material: Low-carbon steel, medium-carbon steel, stainless steel A2
- Strength Grade: Grade 4.8 / Grade 6.8 / Grade 8.8 / Stainless Steel Grade 70
- Surface Treatment: Zinc-plated (blue-white zinc / colored zinc), blackened, natural finish, stainless steel passivated
Product Features
The coupling nut is specifically designed to join two lead screws, lead screws with teeth, or fully threaded studs, providing length extension and a rigid connection.
With uniform wall thickness and sufficient thread depth, the joint maintains high concentricity and minimal runout after connection, making it suitable for tie rods, adjustment mechanisms, and support structures.
Standard hexagonal sides allow direct tightening with a wrench, ensuring simple installation and easy positioning. It facilitates force application more effectively than round connecting nuts.
Grades ranging from standard 4.8 to high-strength 8.8 are available to meet diverse requirements, from light-load adjustment to heavy-load support.
The nuts feature a galvanized or stainless steel finish, providing rust and corrosion resistance, making them suitable for indoor and outdoor machinery, steel structures, and frame adjustments.
Applications
- Extending and joining lead screws, threaded rods, and fully threaded studs
- Adjustment screws, support screws, and tie rods for mechanical equipment
- Tensioning and connecting steel structures, curtain walls, and photovoltaic mounting systems
- Length adjustment for automated equipment, fixtures, and molds
- Lead screw connections for building shoring, scaffolding, and guardrails
Table of Common Sizes for Coupling Nuts (DIN 6334 Standard Type, Units: mm)
|
Specifications |
Opposite-side width s |
Total length L |
Thread length |
|
M4 |
7 |
12 |
12 |
|
M5 |
8 |
14 |
14 |
|
M6 |
10 |
18 |
18 |
|
M8 |
13 |
24 |
24 |
|
M10 |
17 |
30 |
30 |
|
M12 |
19 |
36 |
36 |
|
M14 |
22 |
42 |
42 |
|
M16 |
24 |
48 |
48 |
|
M20 |
30 |
60 |
60 |
|
M24 |
36 |
72 |
72 |
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