Built for dependable locking and long-term performance, these A4 stainless steel split cotter pins are a trusted fastening solution for securing clevis pins, castle nuts, shafts, and other mechanical assemblies where vibration resistance matters. Manufactured to recognised standards including DIN 94 and BS1574, they deliver a consistent fit and reliable retention across a wide range of industrial and construction applications.

Made from corrosion-resistant 316/A4 stainless steel, they’re ideal for demanding environments such as marine, outdoor, wet, and chemical-exposed settings—helping reduce maintenance and extend service life. The split design allows for quick installation and straightforward removal during servicing, while maintaining a strong, secure hold once legs are bent into position.

• A4 / 316 stainless steel for excellent corrosion resistance
• Split cotter pin design for secure locking and vibration resistance
• Produced to common industry standards (DIN 94 / BS1574)
• Suitable for engineering, manufacturing, plant maintenance, and general construction use
• Reliable choice for professional-grade fasteners and fixings

Choose these stainless steel cotter pins when you need a durable, precise fastener that installs easily and performs reliably in tough conditions.

Imperial to Metric Size Explanation (Approximate)

Split cotter pins and similar fasteners are often listed in imperial (inch) sizes, which can be confusing when working in metric. Below is a simple guide to the most common sizes and their metric equivalents:

• 5/32 inch ≈ 4.0 mm

• 3/16 inch ≈ 4.8 mm

• 1/4 inch ≈ 6.4 mm

• 5/16 inch ≈ 7.9 mm

• 3/8 inch ≈ 9.5 mm