These high-quality A2 stainless steel split cotter pins are designed for secure, dependable locking of clevis pins, castellated nuts, shafts, and other mechanical assemblies across industrial, construction, engineering, and manufacturing applications. Built for strength and consistent performance in demanding environments, they help prevent loosening from vibration while delivering a reliable, long-lasting hold.

Manufactured to recognised standards (DIN and BS), each split pin is made for easy installation and dependable retention—ideal for both professional workshops and serious DIY use. The A2 stainless steel construction provides excellent corrosion resistance, making these fasteners a smart choice for outdoor use, general purpose marine-adjacent work, and anywhere durable, rust-resistant hardware is required. 

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

Key features:

• A2 stainless steel for corrosion resistance and long service life
• Split design for secure locking and vibration resistance
• Suitable for a wide range of industrial, commercial, and maintenance tasks
• Made to DIN and BS specifications for consistent fit and performance
• Simple, fast installation for efficient on-site or workshop use

Choose these stainless steel split cotter pins when you need trustworthy fixing hardware that delivers secure fastening, durability, and reliable results job after job.