DIN 6334 Hex Coupling 3d Nut provides an extended internal thread engagement length and is commonly used to connect two threaded rods, studs, or bars for extension or adjustment. The hex exterior allows wrench operation, making it practical for quick on-site joining and tension adjustment.
This product is widely used in suspension supports, building installation, equipment fixing, formwork systems, and mechanical adjustment mechanisms. The 3d coupling length offers more thread contact, helping improve joint stability and adjustment reliability.
Matching threads can be selected according to the connected rod size, with zinc plating, stainless steel, or other finishes available to suit different connection and corrosion-protection requirements.

Dimensions unit: mm
|
Thread size d |
M6 |
M8 |
M10 |
M12 |
M14 |
M16 |
M18 |
M20 |
M22 |
M24 |
M27 |
M30 |
M33 |
M36 |
||
|
P |
Pitch |
|
1 |
1.25 |
1.5 |
1.75 |
2 |
2 |
2.5 |
2.5 |
2.5 |
3 |
3 |
3.5 |
3.5 |
4 |
|
s |
10 |
13 |
17 |
19 |
22 |
24 |
27 |
30 |
32 |
36 |
41 |
46 |
50 |
55 |
||
|
L |
18 |
24 |
30 |
36 |
42 |
48 |
54 |
60 |
66 |
72 |
81 |
90 |
99 |
108 |
||
|
e |
11.05 |
14.38 |
18.9 |
21.1 |
24.49 |
26.75 |
29.56 |
33.53 |
35.03 |
39.98 |
45.2 |
50.85 |
55.37 |
60.79 |
||
|
Weight per thousand pieces (steel)≈kg |
7 |
18 |
42 |
63 |
95.5 |
122 |
140 |
240 |
300 |
412 |
608 |
825 |
1100 |
1470 |
||
① Material:
a) Austenitic stainless steel, grade: A2, A4; strength grade: ≤M39:50, ≤M20:70,80; standard DIN EN ISO 3506-1-1979.
b) Performance strength level: 50, manufactured from A1, A2; characteristics: soft; cold-worked, turned and soft-pressed fasteners; (A2 applies to fasteners of this standard)
c) Performance strength level: 70, manufactured from A2, A4; Features: cold worked, standard strength formed fasteners;
d) Performance strength level: 80, made of A2, A4; characteristics: extremely cold processing, high strength, special purpose
ABOUT US
Better Fastener is a professional fastener enterprise specializing in the manufacturing of steel washers, stainless steel washers, spring washers and sealingwashers. Founded in 2001 as a washer factory, the company expanded into a comprehensive enterprise integrating washers, nuts, bolts, spring nuts and other fastener products in 2010.
The company positions itself as a provider of comprehensive one-stop services for customers, relying on technological R&D, industrial investment and trade distribution.
With an experienced professional team and a sound sales network, Better Fastener has achieved excellent sales performance in both domestic and foreign markets,and has grown into one of the competitive manufacturers and suppliers in China's industrial fastener industry.
Better Fastener is committed to becoming a trusted fastener supplier for customers with reliable product quality, reasonable prices and on-time delivery
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