Description
The Stainless Steel Cotter Pin (GB91 Standard), also known as a split pin, is a secure mechanical fastener designed to prevent loosening of nuts, bolts, and other assembly components. Manufactured from high-quality 304 stainless steel, this cotter pin offers excellent corrosion resistance, durability, and mechanical strength. This cotter pin conforms to the Chinese national standard GB91, guaranteeing precise dimensions and robust performance. It is widely used across automotive, machinery, construction, marine, and hardware applications where reliable locking and safety retention are required.
Features & Benefits
- Superior Material: Made from 304 stainless steel, high wear resistance and corrosion resistance, ensuring long-lasting performance in humid, outdoor, or marine environments.
- Reliable Locking: Standard split pin design. Provides a simple, effective mechanical lock that prevents rotational loosening of nuts and pins.
- Strength & Durability: High hardness, no deformation, strong and durable. Maintains its structural integrity and locking force under vibration and dynamic loads.
- Ease of Use: Standard cotter pin shape. Simple to insert and secure by bending the tines, offering quick and efficient assembly.
Specification
|
Nominal size -d |
d |
a |
b≈ |
c |
|||
|
max |
min |
max |
min |
max |
min |
||
|
0.6 |
0.5 |
0.4 |
1.6 |
0.8 |
2 |
1 |
0.9 |
|
0.8 |
0.7 |
0.6 |
1.6 |
0.8 |
2.4 |
1.4 |
1.2 |
|
1 |
0.9 |
0.8 |
1.6 |
0.8 |
3 |
1.8 |
1.6 |
|
1.2 |
1 |
0.9 |
2.5 |
1.25 |
3 |
2 |
1.7 |
|
1.6 |
1.4 |
1.3 |
2.5 |
1.25 |
3.2 |
2.8 |
2.4 |
|
2 |
1.8 |
1.7 |
2.5 |
1.25 |
4 |
3.6 |
3.2 |
|
2.5 |
2.3 |
2.1 |
2.5 |
1.25 |
5 |
4.6 |
4 |
|
3.2 |
2.9 |
2.7 |
3.2 |
1.6 |
6.4 |
5.8 |
5.1 |
|
4 |
3.7 |
3.5 |
4 |
2 |
8 |
7.4 |
6.5 |
|
5 |
4.6 |
4.4 |
4 |
2 |
10 |
9.2 |
8 |
|
6.3 |
5.9 |
5.7 |
4 |
2 |
12.6 |
11.8 |
10.3 |
|
8 |
7.5 |
7.3 |
4 |
2 |
16 |
15 |
13.1 |
|
10 |
9.5 |
9.3 |
6.3 |
3.15 |
20 |
19 |
16.6 |
|
13 |
12.4 |
12.1 |
6.3 |
3.15 |
26 |
24.8 |
21.7 |
|
16 |
15.4 |
15.1 |
6.3 |
3.15 |
32 |
30.8 |
27 |
|
20 |
19.3 |
19 |
6.3 |
3.15 |
40 |
38.5 |
33.8 |
FAQ
Q1: What is the purpose of a cotter pin?
A cotter pin (split pin) is used to secure fasteners such as nuts, clevis pins, and bolts, preventing them from loosening due to vibration or movement.
Q2: Why choose 304 stainless steel cotter pins?
304 stainless steel provides superior corrosion resistance, making the cotter pin durable even in marine, humid, or outdoor environments.
Q3: Can the cotter pin be reused?
Cotter pins are generally designed for one-time use because bending weakens the metal. For safety, replacement is recommended after removal.
Q4: Do you offer sizes other than M5/M6?
Yes. Standard and customized sizes are available upon request to meet different application needs.
