Description
The SS Cotter Pin is a precision-engineered fastener designed to securely lock nuts, bolts, and clevis pins in place, preventing loosening caused by vibration or axial movement. Also known as a Stainless Steel Split Pin, this product conforms to the GB91 standard, ensuring consistent dimensions, reliable fitment, and dependable performance.
Manufactured from AISI 304 stainless steel, this cotter pin offers excellent corrosion resistance, durability, and long service life in demanding environments such as automotive, marine, construction, and mechanical applications. The diameter range of Ø1.0–Ø2.5 mm makes it particularly suitable for lightweight and precision assemblies, where compact yet secure fastening is required.
Designed for ease of use, the pin is inserted through a pre-drilled hole and secured by bending the tines, forming a simple yet highly effective mechanical locking system.
Features & Benefits
- Excellent Corrosion Resistance: Made from 304 stainless steel, providing strong resistance to rust, oxidation, and environmental exposure in both indoor and outdoor applications.
- Durable and High Strength: Engineered with high hardness and wear resistance, ensuring the pin maintains its shape and locking performance under stress and vibration.
- Reliable Locking Mechanism: The standard split pin design provides a secure and effective way to prevent nuts, bolts, and pins from loosening during operation.
- Precision Manufacturing (GB91 Standard): Produced according to GB91 specifications, ensuring accurate dimensions, consistent quality, and reliable fit for small-scale assemblies.
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 difference between an SS Cotter Pin and a Split Pin?
A: Technically, they are the same fastener. "Split pin" is the common international and technical term (often cited in DIN and ISO standards), while "cotter pin" is the term frequently used in the United States. Both refer to a metal pin with two tines that are bent during installation to secure a joint.
Q2: Why is the Ø1.0mm to Ø2.5mm range important?
A:This range is specifically designed for "precision fastening." While larger pins are used for heavy construction, these smaller diameters are essential for electronics, delicate mechanical linkages, and hobbyist applications where a standard-sized pin would be too bulky or heavy.
Q3: How do I properly install a Stainless Steel Split Pin?
A: Insert the pin through the pre-drilled hole in the bolt or shaft. Use a pair of pliers to bend the protruding tines in opposite directions (or wrap them around the shaft). This creates a physical stop that prevents the pin from falling out and the secured component from moving.
Q4: Does the GB91 standard ensure compatibility with other hardware?
A: Absolutely. The GB91 standard dictates specific tolerances for diameter and head size. This ensures that an M2.0 pin will fit perfectly into any M2.0 hole designed to international standards, providing a reliable and consistent fit every time.
Q5: Can SS cotter pins be reused?
A: While reuse is possible in some cases, it is generally recommended to replace cotter pins after removal to ensure optimal safety and locking performance.
