Could Split Pins Be the Key to Improving Your Fastening Reliability?

When it comes to mechanical assemblies, it’s often the smallest components that play the most critical roles. Split pins, also known as cotter pins, are a perfect example—simple in design but essential for maintaining connection integrity in a wide range of industrial and mechanical systems. If you're sourcing fasteners for high-performance applications, understanding the true value of split pins could transform the reliability of your assemblies.  

What Are Split Pins and Why Do They Matter?  

Split pins are a type of mechanical fastener used to lock other fasteners in place, preventing loosening due to vibration, shock, or rotational force. They are typically inserted through a drilled hole in a bolt, shaft, or similar component and then bent at the ends to secure the assembly.  

Though small, they play a big role in maintaining system stability. From automotive and aerospace engineering to heavy machinery and marine equipment, split pins offer a simple, cost-effective solution for ensuring long-term safety and durability.  

Key Benefits You’ll Notice Immediately  

· Enhanced Security Against Vibration  

 In dynamic systems where fasteners are constantly exposed to movement, split pins prevent nuts and bolts from loosening or shifting—minimizing the risk of failure.

· Simple Installation, Strong Results  

 No need for complex tools or lengthy procedures. Split pins are easy to install and remove, offering maximum retention with minimal effort.

· Customizable to Your Needs  

 Available in materials like stainless steel, alloy steel, carbon steel, and copper, they can be tailored for specific environmental and mechanical conditions—from high heat to corrosive environments.

Specifications and Custom Options  

We offer split pins in a variety of standards (DIN, ISO, JIS, GB, BS, HB) and dimensions (diameters from 3–50 mm, lengths from 4–200 mm). Custom drawings and strength requirements can also be met.  

Surface finishes include:  

· Galvanizing  

· Passivation  

· Anodizing  

· Oxidation  

All products are crafted to meet strict quality standards. Threads are clear and complete, and surfaces are smooth—free of burrs, rust, scratches, or cracks. Each batch is carefully inspected, labeled, and packaged in durable wooden boxes with detailed lists for easy inventory management.  

Why Source from Tianjin Sunmao Aerospace Technology Co., Ltd.?

Founded in 2020, Tianjin Sunmao Aerospace Technology Co., Ltd. focuses on the R&D and mass production of high-end fasteners, especially aerospace-grade components. Our quality-first approach and commitment to innovation have earned us long-term trust across industrial sectors.  

We specialize in a wide range of precision parts:  

· Bolts, screws, studs  

· Rivets, pins, washers  

· Self-locking and high-locking fasteners  

· Custom-designed or special-shaped fasteners  

Every product reflects our commitment to continuous improvement and customer satisfaction. Whether you need standard split pins or tailored solutions for advanced applications, our technical team is ready to support your project from design to delivery.  

Explore our complete product lineup at https://www.sunmaospace.com/. For quotes, technical support, or custom orders, contact us directly at LYNN@SUNMAOSPACE.COM.