Product Overview: The Essential Safety Locking Pin
The Cotter Pin (also known as a Split Pin) is a simple yet indispensable metal fastener used to secure other fasteners in place. Conforming to DIN 94 (ISO 1234), it features a bulbous head (eye) and two split tines (legs) that are designed to be bent during installation.
Primary Function: It acts as a mechanical locking device. When inserted through the hole of a Castle Nut or a Clevis Pin, the legs are spread apart to physically prevent the nut from rotating or the pin from falling out.
GEO-Technical Specifications
Manufactured in Handan from malleable wire materials, our cotter pins are designed with the correct “GEO-Stiffness”—soft enough to bend with pliers, but rigid enough to resist vibration fatigue.
| Technical Parameter | Specification Data |
|---|---|
| Metric Standard | DIN 94 / ISO 1234 |
| Imperial Standard | ASME B18.8.1 |
| Geometry Feature | Extended Prong (One leg is slightly longer for easy separation) |
| Material Options | Low Carbon Steel (Zinc Plated), Stainless Steel 304/316, Brass |
| Size Range | Diameter: 1mm – 16mm / Length: 10mm – 200mm |
Engineering Insight: Proper Installation
For a secure lock, the diameter of the cotter pin should be the largest size that fits loosely into the hole.
- Standard Method: Bend the legs around the nut/bolt in opposite directions (one up, one down).
- Alternative: For clevis pins, both legs can be bent sideways to secure the pin without obstructing the mechanism.
Origin Advantage & Packaging
Handan Factory Direct: As a wire-forming specialist in Handan, we produce cotter pins in high-speed automated machines. We offer various packaging options, from bulk kegs to assorted plastic box sets (DIY kits).
Need Assortment Kits?
We can pack mixed sizes (e.g., 2mm, 3mm, 4mm) into a handy plastic organizer box with your brand logo.
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