There’s a lot to be said about the best cotter pin available in the market today. However, not many know a lot about this tiny yet important part of the vehicle. Commonly called the split pin, this simple fastener holds a bolt in place.

Most moving parts of your car will stop working if this part is missing.New car owners might have many questions regarding the cotter pin. How will you know that you purchased the right brand? What should you look for in a split pin? Can one size fit every vehicle? There are many questions regarding the cotter pin that will be covered in this blog post. So what are we waiting for?

Let's check out which are the best cotter pins on the market and what should you consider before buying one.

What Is the Function of the Cotter Pin?

tool for cars

The split pin is typically a U-shaped fastener that keeps a bolt in place. It has a circular, flared top that makes it easy to insert. The shape allows it to secure the bolt and prevent it from loosening. It’s designed for bolts that have a hole or slot for the cotter pin.When picking a cotter pin, durability and value for money are always a must.

Not every brand delivers the same level of quality, so it’s crucial to check the product before buying. You should also consider the size and the material of which the cotter pin is made.There are a bunch of cotter pins in the market, but how do you know which one exactly should you go for? This list introduces the seven best cotter pin products available today and why they are worth buying.By the way, once you buy one, you can learn how to install it in our other blog post that you can find here.

Our Picks: Top 7 Best Cotter Pins

NEIKO 50457A Cotter Hairpin Assortment Kit- Industry-leading Lifetime Durability

NEIKO 50457A Cotter Hairpin Assortment Kit- Industry-leading Lifetime Durability

When it comes to cotter pins, this brand is super popular between mechanics and DIY enthusiasts. The NEIKO 50457A Cotter Hairpin Assortment Kit tops the list for its outstanding quality. Each piece is constructed to be long-lasting so you don’t have to think about replacements for this one anytime soon.The versatile design is made of zinc-plated steel that allows heavy-duty use.

This pin is corrosion-resistant, ensuring its lifetime durability. The shape makes it easy to slide in and hold the bolt. It offers great stability for the assembly.The NEIKO 50457A boasts a specialty lock that enables a secure fit and holds.

The key included in this package can open four types of locks. The kit comes in a wide variety of sizes encased in a see-through box. You can enjoy the portability it delivers anywhere you travel. It’s always a good idea to have this product in your vehicle, just in case.

Check Latest Price

Pros:

  • Zinc-plated steel for long-lasting durability
  • Corrosion-resistant for better damage protection
  • The high-quality design offers stability and a firm hold
  • Comes in several sizes
  • Includes a key that opens four different locks

Cons:

  • Pins could be a lot stiffer than expected

Bottom Line

NEIKO receives rave reviews especially by online users because of its quality. This assortment of cotter pins is made for different applications, making it a versatile product. It’s great to keep as a spare, too!

Glarks Heavy Duty Zinc-Plated Cotter Pin Assortment Kit- Secure Hold and Fit

Glarks Heavy Duty Zinc-Plated Cotter Pin Assortment Kit- Secure Hold and Fit

Glarks is a worthy candidate in this list because it upholds the standards and more. The Glarks Heavy Duty Zinc-plated Cotter Pin Assortment Kit is another high-quality choice for you. It’s one of the best cotter pin selections used in many applications including automotive and power equipment.What makes a Glarks cotter pin remarkable is its design and construction.

It is zinc-plated to resist corrosion and other harsh elements. Its excellent quality persists throughout seasons. This split pin promises an assortment of sizes so there’s always a perfectly fitting pin to fasten your bolt in place.This 555-piece kit is recommended by many buyers. While the product is praised thanks to its quality, users don’t like the packaging. Several people commented that the pins were scattered and have to be sorted out again.

Check Latest Price

Pros:

  • Zinc-plated steel for long-lasting durability
  • Corrosion-resistant for better damage protection
  • Design is high-quality and consistent
  • Holds well and bends easily
  • Good variety of sizes

Cons:

  • Poor packaging

Bottom Line

If you want value for your money, the Glarks 555-piece cotter pins are definitely worth buying. If you don’t mind the tiny hassle of sorting each one out by size when you receive it, having this product around is the right choice for you.

VIRGUE Cotter Pin Hairpin Assortment Kit Zinc-Plated Steel Hitch Pin- Premium Fasteners That Don’t Need Replacement

VIRGUE Cotter Pin Hairpin Assortment Kit Zinc-Plated Steel Hitch Pin- Premium Fasteners That Don’t Need Replacement

What makes an excellent cotter pin is a secure hold and long-lasting form it boasts. VIRGUE Cotter Pin Hairpin Assortment Kit Zinc-plated Steel Hitch Pin is a complete set for a workshop or DIY use.

It is a 250-piece set of cotter pins and hairpin clips that meets repair needs.You will be satisfied with VIRGUE cotter pins because it is constructed using premium quality steel. It is designed for heavy-duty use and zinc-plated to resist corrosion.

You get durable fasteners that you can rely on to secure bolts in place.This tiny yet useful component is available in many sizes, which makes it versatile to fit cars, trucks, lawnmowers, and more. When you need to secure a bolt, this brand is the go-to for buyers who want reasonably priced best cotter pin.

Check Latest Price

Pros:

  • Zinc-plated steel that improves durability
  • Resists corrosion and premature damage
  • Sturdy and consistent design
  • Versatile pin that can be used in several applications
  • Good variety of sizes

Cons:

  • Poor packaging
  • Cotter pins are disorganized

Bottom Line

The VIRGUE Cotter Pin Hairpin Assortment Kit Zinc-Plated Steel Hitch Pin is a great choice for its affordability and strength. Although the package isn’t tough and durable, the product itself is useful in many ways.

Glarks 6 Sizes 304 Stainless Steel Cotter Pin- Extra Tough Quality

Glarks 6 Sizes 304 Stainless Steel Cotter Pin- Extra Tough Quality

The hairpin-type design of the Glarks 6 Sizes 304 Stainless Steel cotter pin guarantees its sturdy hold for bolts. This set is composed of six varieties of split pins. With a total of 340 pieces, you get the price you pay and more.This is one of the best split pin models because of its 304 stainless steel construction. This material gives extra protection for the pin.

It is highly resistant to corrosion and rust. It’s more durable and unbreakable, making it a leading option in this list.Along with the long-lasting material, this product also boasts specialty locks. It has a large head that prevents the pin from inserting all the way.

Check Latest Price

Pros:

  • High-quality 304 stainless steel construction
  • Resistant to corrosion, rust, and premature damage
  • Hairpin style is more secure and stable
  • Versatile use for cars, trucks, and more
  • Specialty lock with bendable open tips
  • Good variety of sizes

Cons:

  • Slightly more expensive than other models

Bottom Line

Glarks never disappoints and that's also the case with this cotter pin. For a few dollars more, you will get this product that has extra durability that secures a firm hold on bolts.

Hilitchi Cotter Pin Assortment Kit 304 Stainless Steel- Pin for All Environments

Hilitchi Cotter Pin Assortment

Stainless steel is a great material for split pins because it lasts long. The Hilitchi Cotter Pin Assortment Kit 304 Stainless Steel is praised for its outstanding durability. This multipurpose pin is designed for cars, power equipment, and other mechanic works.

It joins the ranks of the best cotter pin for its simple yet efficient quality.

The Hilitchi cotter pins are made of class 304 stainless steel, which is a premium-grade material. It delivers exceptional resistance to rust and corrosion. This fastener can handle extreme conditions in nature, including dirt, grime, and water.You can bend this pin’s ends easily to secure it further. The package contains six commonly used sizes.

Check Latest Price

Pros:

  • High-quality 304 stainless steel construction
  • Resistant to corrosion, rust, and other environmental hazards
  • Versatile use for cars, power equipment, and more
  • Easy-to-bend open tips
  • Good variety of sizes

Cons:

  • Less number of pieces
  • Poor packaging

Bottom Line

Buy Hilitchi if you want cotter pins that can last for a long time. It’s the brand that highlights quality more than anything else, so you will definitely get the best value for your money.

LQ Industrial R Clips Spring Retaining Wire Hair Pins Lynch Cotter- Heavy-Duty Form and Function

LQ Industrial R Clips Spring Retaining

When you want tough and long-lasting split pins, the LQ Industrial R Clips Retaining Wire Hair Pins Lynch Cotter is your must-have. It surpasses other brands because of its carbon steel construction and hairpin style design that makes it effective and safe to fasten.

You can trust the LQ Industrial R Clips to lock bolts the way it should because its hairpin form allows a firm grip. The carbon steel material is highly resistant to corrosion. It is zinc-plated to protect it from premature damage. It slides in fast and is durable, making it ideal for many applications. However, the tips are short and difficult to bend with pliers.

Check Latest Price

Pros:

  • Durable carbon steel material
  • Zinc-plated to ensure corrosion resistance
  • Hairpin design is easy and safe to slide in

Cons:

  • Less number of pieces
  • More expensive than other brands
  • Short tips

Bottom Line

LQ Industrial cotter pin definitely deserves to be one of your options. It can be used both outdoors and indoors, even in humid conditions. If you’re willing to pay a few more dollars for this 20-piece set, just go ahead and make your purchase!

DYWISHKEY 304 Stainless Steel Cotter Pin Assortment Kit- Complete and Convenient

DYWISHKEY 304 Stainless Steel

Last but not least, one of the options that you should also consider is the DYWISHKEY 304 Stainless Steel Cotter Pin Assortment Kit. While it looks like any other split pin, this brand is a top choice because it is guaranteed to deliver high-quality and reliability. Moreover, it also offers a convenient and secure hold on bolts with its design.

The DYWISHKEY cotter pin is made of 304 stainless - making it perfect for both indoor and outdoor use. This 160-piece kit offers a variety of sizes. You get a good assortment of split pins at an affordable price.

Check Latest Price

Pros:

  • Heavy-duty 304 stainless steel material
  • Hairpin design is convenient to use
  • Comes in different sizes
  • Affordable

Cons:

  • Poor packaging

Bottom Line

DYWISHKEY is a good addition to the best cotter pin list. It delivers quality despite being the cheaper option. You might get stuck arranging the pieces, but having this product in your toolbox is more than worth it.

Buyer’s Guide: Things to Consider Before Buying Cotter Pins

The cotter pin might look plain, but there is more than design to consider when buying one. Here are some points to keep in mind before buying it.

Why Buy a Cotter Pin?

A cotter pin is an easy yet effective way of securing bolts in any assembly. It has a wide range of use, but most commonly it is found in cars, power equipment, mowers, boats, and more. This rod-shaped fastener comes in various sizes and forms. When inserted into a bolt, the split pin acts as a stopper. It keeps the bolt stable and prevents it from loosening.

This two-tined fastener does not need fancy installation—just slide it in place and it will do the job. If you want to learn more about its functions, check out our other blog post that covers this topic more specifically here.

tool car

Remember that you should keep a few cotter pins on your toolbox. This tool is simple yet essential when fixing your car regardless of whether it is a minor or a bigger fix.

Qualities of a good cotter pin

  • Durable construction (forms of steel)
  • High-quality plating
  • Follows standard thickness and size
  • Enough tip length to bend and lock the bolt in place
  • Excellent grade construction to prevent breakage

What are the types of cotter pins?

different types of cotter pins

Cotter pins look that simple that people assume they only have one form. However, there are different types of cotter pins to choose from. While each one is two-tined, the shape of the rod could vary.

Asplit cotter pin is the most common, which has a rounded head and bendable tines.Hairpin cotters are another example. It follows the form of an actual hairpin except that it is thicker and bigger. The shape allows for a secure and steady fastening job. Some other types of cotter pins include clinch pins, ring cotters, bowtie pins, and twist pins.

How much should you spend on it?

An assortment of the best cotter pin could be bought at an average price of $10. You will typically get a few pieces of different sizes. It is rarely sold per piece, but having extras won’t be a waste since you might need it in the future.

Can you reuse a cotter pin?

Experts recommend tossing out old cotter pins once you remove them from any installation. A used split pin has lost its initial strength and therefore won’t hold securely. It is better to replace it with a new, unbent pin. You can learn how to remove the old one here.

Final Thoughts

A cotter pin, like any other tiny automotive part, should be included in your toolbox at all times. You never know when you are going to need it, so having a spare around is always a good idea.If you need to buy the best cotter pin, you can refer to this list and choose from brands. These handpicked choices will surely deliver the quality and efficiency you need.