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sourcing map Cotter Pins Review: Reliable fasteners for household and automotive repairs?

sourcing map 20Pcs 4mmx50mm 304 Stainless Steel Cotter Pin, Split Pin Fastener Clips Split Cotter for Household Appliances, Sports Equipment, Car Mechanics Repair (Silver)
4.8
[Precise Dimensions]  4mm wire; 50mm effective, 62mm total length; 20-piece pack ready for projects.
[Premium 304 Stainless Steel]  Corrosion-resistant, high-strength material withstands heat, offering toughness and long-lasting durability.
[Secure Hairpin Lock]  Unique hairpin design locks bolts securely, resists loosening and ensures reliable fixation.
[Easy Installation]  Insert then spread ends at 60° with pliers for quick, tool-friendly securing.
[Wide Application Range]  Ideal for appliances, vehicles, machinery, lawnmowers, and general repair tasks.
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Split-pin fasteners designed for secure, corrosion-resistant locking of bolts and shafts. Peace of mind when repairing lawnmowers, trailers or workshop gear keeps jobs from loosening over time. Are the sourcing map Cotter Pins the reliable pack to keep in a toolbox?

⚡ At a Glance
  • Material Quality: 304 stainless steel for corrosion resistance, strength and good machinability
  • Best for: DIYers, mechanics and gardeners needing reliable split-pin fastenings for common repairs
  • Not ideal for: Applications that require different diameters or customised pin lengths

304 stainless steel split pins, wire diameter 4mm with 50mm effective length, supplied in a 20-piece pack. Hairpin split design locks securely to prevent loosening and suits household and automotive repairs.


Long-lasting corrosion resistance - Thanks to 304 stainless steel

304 stainless steel resists rust and maintains mechanical strength at raised temperatures, while offering good machinability and weldability. The alloy composition delivers durability in humid and outdoor environments.

Corrosion resistance means fittings remain secure over repeated wet-weather use, reducing the need for frequent replacements. Suitable for garden machinery and outdoor vehicle applications where exposure is common.

Secure locking under vibration - With hairpin split design and locking legs

The hairpin form inserts around a shaft then the legs are spread, creating a physical stop that resists axial movement. The special lock shape makes the legs difficult to withdraw once bent.

Reliable fixation prevents nuts and pins rotating loose on trailers, lawnmowers and small engines, so repairs stay put during use. Ideal for applications where vibration would otherwise cause fasteners to back off.

Quick, fuss-free fitting - With simple insertion and 60° leg bend

Insert through the matched hole and spread the leg ends using pliers or a screwdriver to about a 60-degree angle, creating an effective clamp around the shaft. No specialised tools are required.

Fast installation gets machines back in service quickly, making these useful for on-the-spot roadside or garden repairs. The straightforward method also reduces the chance of incorrect fitting.

✨ The 4 Key Reasons for sourcing map Cotter Pins
  1. 20-Piece Pack - Holds enough spare pins for several repair jobs
  2. 304 Stainless Steel - Resists corrosion and maintains strength in humid conditions
  3. Hairpin Split Design - Locks over shafts to prevent nuts from rotating loose
  4. Easy Installation - Bend legs to 60° to secure fasteners quickly
📋 Technical Details at a Glance
  • Material: 304 stainless steel
  • Wire diameter: 4mm (0.16")
  • Effective length: 50mm (1.97")
  • Total length: 62mm (2.44")
  • Total width: 7mm (0.28")
❓ Frequently Asked Questions

Q: Are these suitable for outdoor use?

A: Yes, 304 stainless steel gives good corrosion resistance, making the pins suitable for outdoor and humid conditions.

Q: What are the exact dimensions of the pins?

A: Wire diameter is 4mm, effective length is 50mm and total length is 62mm with a total width of 7mm, so check these against the hole and shaft being used.

Q: How should the pins be installed?

A: Insert into the hole then use pliers or a screwdriver to spread the leg ends to about a 60-degree angle to prevent rotation and secure the fastener.

🏆 Our Verdict

Ideal for DIYers, gardeners and mechanics who need dependable split-pin fastenings for common repairs. Durable 304 stainless steel combined with a hairpin locking form delivers corrosion resistance and secure fixation under vibration. An economical, practical pack of spares that should reduce repeat fix trips and keep equipment running longer.