GB879 304 Stainless Steel Spring Cotter Pins M1.5–M6 | 5–20mm

GB879 Stainless Steel Split Spring Cotter Pins – M1.5 to M6

Keep your mechanical assemblies secure and precisely positioned with these GB879 304 Stainless Steel Split Elastic Cylindrical Cotter Pins. Available in a full range of metric sizes from M1.5 to M6 and lengths from 5mm to 20mm, these split spring pins are engineered for reliable, repeatable positioning in both light-duty and demanding metalworking applications.

Made in China.

Why Choose These Spring Cotter Pins?

• Premium 304 Stainless Steel – Corrosion-resistant and built to last in humid or challenging environments.
• GB879 Standard – Manufactured to the GB879 national standard for consistent fit and reliable performance.
• Split Elastic Design – The cylindrical split form allows slight compression on insertion for a secure, vibration-resistant fit that won't back out.
• Wide Size Range – Covers M1.5, M2, M2.5, M3, M4, M5, and M6 diameters, with lengths from 5mm to 20mm, so you can tackle diverse projects with one source.
• CE Certified – Meets quality and safety benchmarks for professional and DIY use.
• Multi-Pack Quantity – Comes in packs of 50–99 pieces so you always have spares on hand.
• Customizable – Custom sizing and quantities available to match your specific project requirements.

Specifications

Common Applications

• Shaft and axle positioning in machinery and equipment
• DIY metalworking and fabrication projects
• Automotive assemblies and repairs
• Electronics enclosures and housings
• Hinges, brackets, and mechanical linkages

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Frequently Asked Questions

Q: What sizes are available for these GB879 spring cotter pins?

A: These split elastic cylindrical pins are available in metric diameters M1.5, M2, M2.5, M3, M4, M5, and M6, with lengths ranging from 5mm to 20mm. This wide range makes them suitable for a broad variety of mechanical and DIY metalworking applications.

Q: Why are 304 stainless steel cotter pins better than standard carbon steel pins?

A: 304 stainless steel offers superior corrosion resistance compared to standard carbon steel, making these spring pins ideal for use in moist environments, outdoor applications, or anywhere long-term durability is important. They maintain their structural integrity without rusting or weakening over time.

Q: How does a split spring cotter pin work?

A: A split elastic cylindrical (spring cotter) pin is slotted along its length, which allows it to compress slightly during insertion into a drilled hole. Once seated, the pin's natural spring-back creates a tight, secure fit that resists loosening from vibration and movement — no additional fasteners or adhesives required.

Q: Can I order a custom size or quantity?

A: Yes! These pins are available in custom sizes and quantities. Please reach out via the store's contact page to discuss your specific requirements for bulk or non-standard orders.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.