Manufactured from imported European beech sheets and Russian birch veneers, our laminated wood bolts and nuts feature excellent insulation, bending resistance and tensile strength. Equipped with patented technology, sizes range M8-M20 & round rods 6mm-25mm, ideal for oil-immersed transformers and high-voltage electrical equipment.
1. Product Introduction
Our laminated wood bolts and nuts are professional insulating fasteners specially developed for high-voltage power equipment. We adopt high-quality beech sheets imported from Europe as raw materials, which are processed into resin-impregnated pressed slabs. With a full set of automatic tapping machines and other advanced production equipment, we complete precision machining.
For supporting round rod materials, we use birch veneers imported from Russia for compression molding. All products are produced with our independent patented technology, ensuring stable quality and superior overall performance.
These fasteners combine outstanding electrical insulation, excellent bending resistance and high tensile strength. They are oil-resistant, dimensionally stable and not easy to deform in long-term oil immersion environments, becoming the preferred fastening components for transformers.
2. Main Features
Premium Imported Raw Materials:
European beech and Russian birch raw materials with uniform texture, high density, low moisture absorption and great oil compatibility.
Advanced Production & Patented Technology:
Resin dipping, hot pressing and fully automatic threading processing. Own core patents to guarantee consistent mechanical and insulating properties per batch.
Excellent Comprehensive Performance
Superior insulation performance to prevent partial discharge in high voltage; high tensile & compressive strength, strong bending resistance, firm clamping without loosening.
Wide Size Coverage
- Standard bolts & nuts: M8 ~ M20
- Laminated wood round rods: 6mm ~ 25mm
- Custom specifications and machining are acceptable.
Long Service Life
Resist temperature change, aging and oil corrosion, suitable for continuous operation inside oil-immersed electrical equipment.
3. Technical Parameters
|
Bolt |
|||
|
Specification |
D(mm) |
Tolerance(mm) |
Thread pull offs strength |
|
M8 |
8 |
-0.028/-0.24 |
2 |
|
M10 |
10 |
-0.032/-0.268 |
4 |
|
M12 |
12 |
-0.034/-0.299 |
6 |
|
M16 |
16 |
-0.038/-0.318 |
11 |
|
M20 |
20 |
-0.042/-0.377 |
16 |
|
Nuts |
|||||||
|
D(mm) |
d(mm) |
Tolerance(mm) |
W(mm) |
H(mm) |
Thread pull offs strength |
||
|
M8 |
6.6 |
+0.265/+0 |
19 |
+0/-0.5 |
10 |
+1/-0.5 |
2 |
|
M10 |
8.4 |
+0.3/+0 |
22 |
10 |
4 |
||
|
M12 |
10.1 |
+0.335/+0 |
24 |
12 |
6 |
||
|
M16 |
13.8 |
+0.335/+0 |
32 |
16 |
11 |
||
|
M20 |
17.3 |
+0.45/+0 |
36 |
20 |
16 |
||
Application:
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