Description
The 304 Stainless Steel JIS B 1251 Spring Washer is a high-performance helical lock washer designed to prevent loosening and maintain tension in bolted assemblies. Manufactured according to the Japanese Industrial Standard JIS B 1251, this spring washer ensures consistent performance, dimensional precision, and reliability. Crafted from durable 304 stainless steel, it offers outstanding corrosion resistance and mechanical strength, making it ideal for demanding applications in both industrial and commercial environments. The JIS B 1251 Spring Washer is engineered for precision and reliability. Its combination of superior stainless steel strength, standardized design, and anti-loosening performance ensures that fasteners stay secure even in high-vibration environments, making it ideal for everything from securing heavy machinery to critical outdoor infrastructure.
Features & Benefits
- 304 Stainless Steel Material: Provides high wear resistance, corrosion resistance, and strong oxidation resistance, ensuring the washer remains rust-free in humid environments.
- Helical Split-Ring Design: The unique design increases vertical tension and provides a strong, reliable locking mechanism, making the fastening more secure.
- High Hardness & No Deformation: The superior material and manufacturing process ensure the washer maintains its shape and spring tension even under high-stress loads.
- Standard Concentricity & Smooth Surface: Ensures fine fit, uniform load application, and a large bearing surface when matched with bolts, preventing damage to the mating surface.
Specification
|
Nominal diameter |
d |
b |
t |
dc |
ho |
|||||
|
min= nominal |
max |
nominal |
max |
min |
nominal |
max |
min |
max |
(≈1.5t) |
|
|
Φ2.5 |
2.6 |
2.9 |
1 |
1.1 |
0.9 |
0.6 |
0.7 |
0.5 |
5.2 |
0.9 |
|
Φ3 |
3.1 |
3.4 |
1.3 |
1.4 |
1.2 |
0.7 |
0.8 |
0.6 |
6.3 |
1.05 |
|
Φ3.5 |
3.6 |
3.9 |
1.3 |
1.4 |
1.2 |
0.7 |
0.8 |
0.6 |
6.8 |
1.05 |
|
Φ4 |
4.1 |
4.4 |
1.5 |
1.6 |
1.4 |
0.8 |
0.9 |
0.7 |
1.7 |
1.2 |
|
Φ5 |
5.1 |
5.4 |
1.8 |
1.9 |
1.7 |
1 |
1.1 |
0.9 |
9.4 |
1.5 |
|
Φ6 |
6.1 |
6.5 |
2.5 |
2.65 |
2.35 |
1.2 |
1.3 |
1.1 |
11.9 |
1.8 |
|
Φ8 |
8.2 |
8.6 |
3 |
3.15 |
2.85 |
1.6 |
1.7 |
1.5 |
15 |
2.4 |
|
Φ10 |
10.2 |
10.8 |
3.5 |
3.7 |
3.3 |
1.8 |
1.95 |
1.65 |
18.4 |
2.7 |
|
Φ12 |
12.2 |
13 |
4 |
4.2 |
3.8 |
2.1 |
2.25 |
1.95 |
21.6 |
3.15 |
|
Φ14 |
14.2 |
15 |
4.5 |
4.7 |
4.3 |
2.4 |
2.55 |
2.25 |
24.6 |
3.6 |
|
Φ16 |
16.2 |
17.2 |
5 |
5.2 |
4.8 |
2.8 |
3 |
2.6 |
27.8 |
4.2 |
|
Φ18 |
18.2 |
19.2 |
5.5 |
5.7 |
5.3 |
3 |
3.2 |
2.8 |
30.6 |
4.5 |
|
Φ20 |
20.2 |
21.4 |
6 |
6.2 |
5.8 |
3.2 |
3.4 |
3 |
33.8 |
4.8 |
|
Φ22 |
22.5 |
23.7 |
6.5 |
6.7 |
6.3 |
3.5 |
3.7 |
3.3 |
37.1 |
5.3 |
|
Φ24 |
24.5 |
25.7 |
7 |
7.25 |
6.75 |
3.8 |
4.05 |
3.55 |
40.2 |
5.7 |
|
Φ27 |
27.5 |
28.7 |
7 |
7.25 |
6.75 |
4 |
4.25 |
3.75 |
43 |
6 |
