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Curt Pin and Clip for 2" and 2-1/2" Hitches - 5/8" Diameter x 3-3/16" Span

Curt Pin and Clip for 2" and 2-1/2" Hitches - 5/8" Diameter x 3-3/16" Span

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This 5/8" diameter pin fits 2" and 2-1/2" square receiver hitches. Includes retaining clip. Rubberized, plastic-coated ends give you a secure grip for easy installation and removal. Zinc finish resists corrosion. 1-800-940-8924 to order CURT hitch pins and clips part number C21510 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Pin and Clip for 2" and 2-1/2" Hitches - 5/8" Diameter x 3-3/16" Span. Hitch Pins and Clips reviews from real customers.
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  • Reviews (789)
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  • Videos (2)
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CURT Hitch Pins and Clips

  • Fits 2 Inch Hitch
  • Fits 2-1/2 Inch Hitch
  • Standard Hitch Pin
  • 5/8 Inch Diameter
  • 3-3/16 Inch Span
  • CURT

This 5/8" diameter pin fits 2" and 2-1/2" square receiver hitches. Includes retaining clip. Rubberized, plastic-coated ends give you a secure grip for easy installation and removal. Zinc finish resists corrosion.


  • Hitch pin secures ball mount or other hitch-mounted accessory in your trailer hitch receiver
    • Included clip inserts into end of pin to hold pin in place
  • Sturdy steel construction
  • Corrosion-resistant zinc-plated finish
  • Pin and clip have a rubberized, plastic-coated grip for easy installation and removal


  • Application: 2" x 2" and 2-1/2" x 2-1/2" trailer hitch receivers
  • Pin diameter: 5/8"
  • Usable length (span): 3-3/16"
  • Overall length: 5-1/2"

21510 Curt Pin and Clip For Class III, IV and V Trailer Hitch Receiver with Rubberized Plastic Grip

Item # C21510

Video of Curt Pin and Clip for 2" and 2-1/2" Hitches - 5/8" Diameter x 3-3/16" Span

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Curt Class III, IV and V Pin and Clip Review

Today we're going to be taking a look at the Curt Pin and Clip with a rubberized plastic grip, Part Number C21510. Now this 5/8ths pin and clip is going to fit class 3, 4 and 5 hitches, that's both 2" and 2 1/2" square receiver tubes. The rubber coating on both the pin, and clip, help you get a better grip for installation and removal. It's great for cargo carriers or bike racks that don't have an anti-rattle feature, or any of your other hitch mounted accessories that require a 5/8ths hitch pin and clip. Let's go for a quick ride to show you how it holds up while we're on the road. That's going to complete our look at the Curt Pin and Clip with rubberized plastic grip, Part Number C21510..

Customer Satisfaction Score:

Customer Reviews

Curt Pin and Clip for 2" and 2-1/2" Hitches - 5/8" Diameter x 3-3/16" Span - C21510

Average Customer Rating:  4.9 out of 5 stars   (789 Customer Reviews)

This 5/8" diameter pin fits 2" and 2-1/2" square receiver hitches. Includes retaining clip. Rubberized, plastic-coated ends give you a secure grip for easy installation and removal. Zinc finish resists corrosion.


Great price … easy install…. Great quality product…..have bicycle platform rack installed on it.. also have Curt 4 way wiring harness and lighting… also excellent


I use this Curt hitch pin and clip when I'm using the receiver plug-even though I COULD use it with my hitch. Being an expensive hitch, I like RH5-XL when it's on my truck. The Curt is better than plain hitch pins because of the rubber on both the pin and the clip, which gives a better grip when it's cold or wet. Etrailer, as usual, got it to me fast, and the price was right. Also, I like that the clip goes through the pin instead of into a slot, making it somewhat harder for the clip to fall out or spread the legs of the clip over time-at least I think so.

Still working like a champ. No rust, a little wear on the pin, but it still works like day 1.
Rich G - 04/23/2019


This ball fit perfectly on the hitch. The camper hooks up to it very easily.


Nice sturdy pin and clip.

Still going strong one year later
Stephen - 10/03/2022


Fits great and an amazing new addition to my vehicle! Love it!


Very nicely made with a protective coating on th handle portion


Be nice if it actually worked on 2 1/2” hitches the pin is a 1/4 short on my gmc to put safety pin in

There are hitch pins that will have a longer usuable length like part # 337HP6256WC
Hitch Pin and Clip For 2-1/2" and 3" Hitches - 5/8" Diameter x 4" Span
which has a 4-inch span.
-- Etrailer Expert Jenny N - 03/31/2022


Good quality pin and clip set for an affordable price.


Excellent product and easy install on my Ram Express. I have been pulling a 33' travel trailer with no issues. You can't go wrong with this product.


Perfect fit for the 2022 Honda CRV. Installation was straight forward with the included instructions and watching the installation video also helped. Overall, it took about an hour and a half to install.


Ordered this with a trailer hitch. It is a solid product and I'm very happy with it.

still a solid product.
Haywad - 04/20/2022


This was a PERFECT transaction! The item is of high quality and very easy to use. I will buy from you guys again. My husband was so so satisfied! Happy Hubby makes Happy Home!


Great quality at a good price!!!

Very good product and extremely strong!!!
Don W - 10/11/2022


Works great!


Easy installation. Great for hauling bikes etc. Cosmetically hitch looks great with no rust


Great products, great company.


Excellent for the hitch assembly. Easy to work with.


Was hoping the hitch came with this. Was lucky it made the trip, since the hitch tore through the box during shipping and this could easily have fallen out of the gaping hole. Maybe just charge a couple more bucks and include this?


We're thoroughly pleased with both Paula and our order (a tow hitch cover). The cover looks exactly the way it looks on the website!


Great service, great products


As usual, I received exactly what I ordered. Everything works great. There was a couple days delay in delivery due to bad weather,but that's understandable. I've ordered numerous items over the years from etrailer with no problems. Always on time, exactly what I ordered and customer service second to none. Thank you etrailer. When it comes to my towing needs, etrailer is the place.


It's a hitch pin. It does what hitch pins do. No complaints.

Still working good after a year. Shed a little of the rubber on the hamdle but no biggie.
Big J - 01/17/2022


Delivered promptly as ordered. Good price. Mechanic had installed in an hour. He is the person who referred me to this brand. All the parts are heavy duty and well made. I’m not an expert but so far so good on all aspects.


Worked great!


I'm very pleased with my purchase of the Curt trailer hitch. Self installation went fairly smooth. I'm getting a lot of use out of my hitch with my bike rack. The instructions were pretty straight forward, plus some YouTube videos helped. I would definitely recommend the Curt hitch.

Show More Reviews

See what our Experts say about this CURT Hitch Pins and Clips

  • What is the Weight Rating of the Curt Pin and Clip # C21510
    Hitch pins are not given weight ratings because they are built with such extreme weight bearing capabilities that the trailer hitch, ball mount or trailer coupler is more likely to fail than the hitch pin. Most Class IV trailer hitches have a maximum towing capacity of 12,000 lbs and a tongue weight capacity of 1,000 lbs. Before you tow your horse trailer, you will also want to verify the towing capacity of your tow vehicle. There are instances where a Class IV hitch is available for...
    view full answer...
  • Recommended Pin And Clip To Replace Lost Pin On Curt Folding Cargo Carrier For 2 Inch Receivers
    It sounds like the pin that allows the cargo carrier to be tilted up or down is what you are missing. I have attached a photo of the pin on a cargo carrier. If that is the pin and clip that is missing I recommend using part # C21510 as a replacement. This pin is designed for 2 inch and 2-1/2 inch trailer hitches and my contact at Curt said the pin would work well for you.
    view full answer...
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  • Hitch For A 2013 Chevy Express 4500 Cutaway
    We offer universal fit hitches that fit many different vehicles. To add a class IV or V hitch to your 2013 Chevy express 4500 Cutaway from the hitches we carry, would require the hitch to be welded in place. I recommend the Curt Class V Universal Weld-on Receiver Hitch Item # 15903. This hitch fits frame rail spacing from 18" apart up to 61" apart, has a 1500lb max tongue weight with a 15000lb gross towing capacity, a 2" x 2" receiver tube opening with a 5/8" hitch pin hole. I also recommend...
    view full answer...
  • What is Difference Between Hitch Pin Diameters of 1-1/4 inch and 2 inch Hitches
    The Curt Class I and II Pin and Clip # C21410 is designed for use on 1-1/4 inch trailer hitches which do have 1/2 inch diameter hitch pin holes. The larger 5/8 inch hitch pins are used on the larger 2 inch hitch size. For that we have the part # C21510.
    view full answer...
  • Bolt Hole Measurements of the Curt Trailer Hitch Receiver Class III 2" # 13408
    My contact at Curt Manufacturing confirmed, that the bolt holes on the Curt Trailer Hitch Receiver Class III - 2" # 13408, are spaced 4.35" on center from front to back. The forward most holes are spaced 39.937" apart on center, and the rear most holes are 39.437" apart on center.
    view full answer...
  • Bumper Clearance on Curt High-Low Adapter # C59KR
    The Curt High-Low Adapter # C59KR should work for giving you ground clearance for your cargo carrier. The measurement from the shank hitch pin hole to the back end of the top receiver is 5-1/2", which should be enough clearance for your bumper. Refer to the diagram attached below and measure your hitch setup to make sure. Note this adapter does not come with a hitch pin and clip. If you need one, I recommend the Curt # C21510. Check out the videos linked below for more details on these...
    view full answer...
    Image 1 for
  • Adapter For 2 Inch Hitch to Use Curt Bike Rack C18029
    While there is not a replacement sleeve adapter for the rack, there is a way to still use it in your 2 inch hitch so you don't have to get a new bike rack. What you can do is use a 2" to 1-1/4" adapter, and it will also need a pin and clip to secure the adapter to your hitch: - Hitch Adapter 2" to 1-1/4" Trailer Hitch Receiver # 80300 - Pin and Clip # C21510
    view full answer...
  • Can Chains be Connected to Curt Hitch Extender
    There is not a place for safety chains to connect to the 18" Curt Extender for 2" Receivers # C45796 so you would need to get new safety chains as well; I have added a link to our selection of safety chains for you to check out such as the 60" # C19749. Keep in mind you will need Pin and Clip # C21510 in order to attach the extender to your current hitch, and that an extender is going to reduce the capacity of your current trailer hitch by 50 percent.
    view full answer...
  • Recommended Hitch Pin for Curt Trailer Hitch on a 2019 Honda Pilot
    The hitch pin hole on the Curt Trailer Hitch Receiver # C13146 for your 2019 Honda Pilot has a 5/8" diameter as you can see in the attached installation video. If you are just wanting a standard hitch pin and clip then I recommend the part # C21510. For a locking hitch pin I recommend the Curt # C23519 instead.
    view full answer...
  • What Size Hitch Pin Fits Pro Series Cargo Carrier for 2 Inch Hitch
    For a traditional pin and clip, I would recommend Curt's hitch pin and clip # C21510. This hitch pin and clip is designed to work with Class III, Class IV, and Class V trailer hitches. If you are looking for a locking hitch pin, I recommend this stainless steel lock # e98882. This locking hitch pin is designed to fit Class III and Class IV hitches.
    view full answer...
  • What is the Correct Hitch Pin Size for a 16 Foot Trailer
    The hitch pin you need is going to depend on which size receiver you have on your hitch. More than likely you have a 2" receiver, which means you want a 5/8" diameter hitch pin like the Curt Pin and Clip for 2" and 2-1/2" Hitches - 5/8" Diameter x 3-3/16" Span # C21510. Just to be clear, the cotter pin is the smaller pin that comes with the hitch pin in order to secure it. If you're looking for a ball mount and have a 2" receiver, I recommend the etrailer Ball Mount Kit - 3/4" Rise or...
    view full answer...
  • Options for Securing Au-Tomotive Gold Honda Trailer Hitch Cover AUT-HON-C In Hitch Opening
    The Au-Tomotive Gold Honda Trailer Hitch Cover # AUT-HON-C does not include a pin-and-clip nor a gasket for installation. A pin-and-clip kit # C21510 is available, as is a locking anti-rattle kit # 63232 which will both prevent theft and eliminate any potential for rattle in the hitch opening. This hitch cover will easily fit in your 2-inch hitch.
    view full answer...
  • Pin and Clip and Locking Hitch Pin Recommendation for US Air Force Trailer Hitch Cover # AUT-AIRW-C
    The US Air Force Trailer Hitch Cover # AUT-AIRW-C that you referenced does not come with a hitch pin. For a standard hitch pin you would want the part # C21510. For a locking hitch pin you would want the part # 5201.
    view full answer...
  • 18 Inch Hitch Extender that Fits 2 Inch Trailer Hitch
    The # D30 you referenced is for hitch fabrication and it sounds like you simply need a hitch extender. There is an 18 inch extension, the Curt Extender for 2" Receivers -18" Long # C45796 which you can use with a bike rack. The only thing to note is that the use of any extender will reduce the overall capacity of the hitch by 50 percent and that includes the tongue weight capacity. This is important because the tongue weight capacity of your hitch is the max weight your bike racks and...
    view full answer...
  • How to Choose the Correct Ball Mount for a 2017 Subaru Forester
    In order to choose the correct ball mount you will need to measure from the ground to the top of the inside edge on the vehicle's receiver tube opening and then compare that to the distance from the ground to the bottom of the coupler on the trailer while level. The distance between these two measurements will give you the correct amount of rise/drop you will need to look for in a ball mount. For a ball mount with a 5" rise I recommend part # C45336 and for a ball mount with a 6" rise...
    view full answer...
  • Replacement Hardware Kit for Curt Trailer Hitch Receiver 13416
    For your Curt # C13416 you will need the Replacement Hardware Kit for Trailer Hitches # RHK. This does not come with the hitch pin clip so you will need # C21510 or # C21500.
    view full answer...
  • How to Use Hitch Mount Spare Tire Carrier For 2 Inch Hitch in 1-1/4 Inch Hitch
    There is a way to use a hitch-mounted spare tire carrier in your 1-1/4 inch hitch, though there isn't a carrier that fits that size hitch by itself. Instead, you would need an adapter, so what you can use is the following: - Curt Trailer Hitch Mounted Spare Tire Carrier # c31006 - Hitch Adapter 1-1/4" to 2" Trailer Hitch Receiver # HTAD Just keep in mind this will reduce the overall capacity of your hitch by 50 percent. So if your hitch has a tongue weight capacity of 200 lbs, for example,...
    view full answer...
  • Recommended Hitch Pin to Work with Curt Forged Ball Mount
    We have hitch pins to work with the Curt Forged Ball Mount, part # C45456, however it doesn't include one. I recommend the Curt Pin and Clip, part # C21510, for a standard pin, or even better, part # e98881 for a locking pin. If you also need a compatible hitch ball use part # 63840.
    view full answer...
  • Hitch Adapter to Raise a Cargo Carrier up 8 for Clearance in a Low Vehicle
    I can provide you with an option but you probably aren't going to be hitting the 200 lb. mark you are hoping for, especially after taking the weight of the cargo carrier into consideration. You can use the Roadmaster High-Low Adapter # RM-048-8. The catch is that when using an adapter that extends your hitch, which is what an adapter to gain rise does. You will reduce your hitches tongue weight rating by 50%. Obviously, how much weight that leaves you with depends on the hitch that you...
    view full answer...
  • Trailer Hitch Receiver For 2022 Toyota Sienna For Bike Rack
    There are indeed only 2 inch trailer hitch receivers that fit your 2022 Toyota Sienna, though if your bike rack only fits a 1-1/4 inch hitch, you can use a hitch adapter and reducer. First, for the hitch, by far the best option for a bike rack for your '22 Sienna is the following: - etrailer Trailer Hitch Receiver # e56RR Not only does the # e56RR have the best bumper clearance, but it also has a matte black finish which hides the inevitable dings and scratches better than glossier finishes....
    view full answer...
  • How to Prepare a 2" Trailer Hitch Receiver for Winter Weather
    In order to prevent rust from accumulating inside the trailer hitch receiver while not in use I recommend using a hitch cover like the Tow Ready Black Plastic Hitch Cover for 2" Trailer Hitches part # TR1202 to cover the receiver tube opening and a standard hitch pin like the Curt Pin and Clip part # C21510 to cover the hitch pin hole.
    view full answer...
  • How To Fix Stripped Threads On the Hitch Pin Hole In the Shank for the Reese Eclipse 4 Bike Rack
    If you have the hitch pin for the Reese Eclipse 4 Bike Rack part # 63124 engaged enough so that the cotter pin can be inserted into the other side, then this will be sufficient in order to hold the shank inside of the receiver tube. That said, the bike rack may not be as stable as it would be with full thread engagement so that is something to keep in mind. I cannot really recommend that you drill and tap the weld nut inside the shank, but you could just drill this out with a 5/8" drill...
    view full answer...
  • Does Buyers Products BH10 Series Combination Hitch Fit Pintle Hook Mount 337PM25812
    Yes, the Buyers Products BH10 combination hitch will absolutely bolt to the pintle hook mount. The hitch has a mounting holes that are spread apart 1-3/4" vertically and 3-3/8" horizontally, which is the same distance between the holes on the mount. So the two parts you asked about will be a perfect match: - Buyers Products 10 Ton Combination Hitch with Mounting Kit - 2-5/16" Ball - BH10 Series # 33710057 - Buyers Products 3 Position Pintle Hook Mount for 2-1/2" Receiver # 337PM25812 Both...
    view full answer...
  • Can 18 Inch Hitch Extension be Used With 2 Inch Drop Ball Mount
    Yes, your 2000 Ford F-350 can use a ball mount with a 2 inch drop like # C45310 with an 18 inch extension, the Curt Extender # C45796. Keep in mind an extender will reduce the capacity of your trailer hitch, the Reese by 35 percent and the Curt by 50 percent. The extensions will also need a pin and clip or hitch lock to secure to your Ford's hitch, the Pin and Clip # C21510 or Hitch Lock # e98880.
    view full answer...

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