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Curt S-Hook with Wire Keeper for Safety Chains and Cables - 3/8" - 2,000 lbs

Curt S-Hook with Wire Keeper for Safety Chains and Cables - 3/8" - 2,000 lbs

Item # C81810
Our Price: $4.41
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Shipping Weight: 0.25 lbs
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This durable S-hook lets you easily connect a safety cable or chain to your tow vehicle or trailer. Sturdy, zinc-coated steel hook measures 3/8" in diameter and has a wire keeper. 1-800-496-5010 to order CURT accessories and parts part number C81810 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt S-Hook with Wire Keeper for Safety Chains and Cables - 3/8" - 2,000 lbs. Accessories and Parts reviews from real customers.
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  • Reviews (24)
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  • Videos (1)
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CURT Accessories and Parts - C81810

  • Tow Bar
  • Trailer Safety Chains
  • Safety Cable Parts
  • Safety Chain Parts
  • S-Hooks
  • CURT
  • 3/8 Inch Diameter
  • 2000 lbs GTW

This durable S-hook lets you easily connect a safety cable or chain to your tow vehicle or trailer. Sturdy, zinc-coated steel hook measures 3/8" in diameter and has a wire keeper.


  • S-hook lets you quickly connect a safety cable or safety chain to any application
  • Wire keeper helps prevent hook from accidentally disconnecting
  • Steel construction is strong and durable
  • Zinc coating resists corrosion


  • Weight capacity: 2,000 lbs
    • SAE Class I
  • Diameter: 3/8"
  • Quantity: 1 S-hook
  • 1-Year limited warranty

81810 2000 lb S Hook by Curt

Video of Curt S-Hook with Wire Keeper for Safety Chains and Cables - 3/8" - 2,000 lbs

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

Video Transcript for Curt Safety Chains and Cables S-Hook with Wire Keeper Review

Hi there safety conscious haulers. Today, we're gonna be taking a look at CURT's S-Hooks with the latch. These are available in either a 3/8" diameter, 7/16" diameter, or 17/32" diameter. That's important for determining the appropriate size to fit through either your safety cable loop and your safety chain. If you're using on a trailer, your safety chains, depending on how thick the diameters of those and the weight ratings are also going to correspond with those sizes. For the 3/8", it's going to have a 2000 pound weight rating, for the 7/16" it'll be 5000 pounds.

and for the 17/32", it'll be 7,600 pounds. And you can see here, we've got S-Hooks installed on safety chains on a pop up camper back here. So they're not exclusive to just flat tow setups. This one here is just a standard one that doesn't have a security latch. So this is a good candidate for an upgrade for one that does have that latch.

So that way they know that they're going to be safe, no matter what, whether they're hitting those bumps down the road, this isn't going to be able to just pop off of there, it's going to stay in place. Just make sure you pick the appropriate diameter and weight for your particular trailer to make sure it'll slide through your chain links and that you've got enough capacity here for the event you do have a catastrophic disconnect. So here you can see why we're going to be replacing our S-Hook here. This is the one we've currently got on here, and you can see it comes off really easily. This particular S-Hook you can notice it's got a couple of holes in it there at the bottom.

Those two holes are where the latch mechanism used to be. It got a little corroded and worn out here, and then it's actually just fallen off down the road. A customer no longer has it. The hook does still function as an S-Hook, but we've lost that extra security of the latching function now. And on the back of these motorhomes, there's so much motorhome that hangs off back behind the rear axle, when you hit bumps and stuff like that, there's a lot of up and down motion and force.

And in most cases, the cables don't move around too much because they're coiled cables. They got some tension on them and stuff like that, that holds them in place. All those major forces going on, it could leave it in a position where it could throw the hook up and it could detach. It's very unlikely, but adding an, that latch in there that it used to have is going to help ensure it stays in place. So we have replacement S-Hooks here with latches that you can get from We've got them in a variety of sizes, so you can make sure you get the appropriate one with the right weight and also the right diameter to fit through your particular safety cable or safety chain, depending if you're installing this in a flat tow setup, or if you're installing this on a trailer. Our release mechanism here, you can see where it slides into those two holes. So it's pretty much identical to the one that was on there before it's going to give us the same functionality. So now we're just going to show you how to get this old one off of here and then how to get the new one installed. So we've gone ahead and brought it inside. We've attached it to our vice here. You could try to spread this apart, however, this is some pretty thick metal. It's extremely difficult to get it clamped tight enough in there to be able to get this spread apart, to slide your cable out. So in most cases, it easier to take your cutoff wheel and just cut this off of here. Now we've got to cut pretty much all the way through. You can just take it off of there and our cable should slide out of there. I have to pop it out of the vice. When you do pop it out of the vice, just cut this, it's going to be really hot. So don't touch that little piece there. So you might have to grab a pair of pliers just to work it off of there. There we go. Now we can go ahead and install our new one. This is simply just going to slide in place just like that. And then we can crimp it down in our vice here. And we just kind of squeezed it until we know it's closed. We'll then just going to loosen it up some. It will likely spread open some. So just want to check to see where you're at. That looks still looks pretty good, no way that that's going to come off of there. So we've now got this attached and replaced. We're ready to go put it back into service on our flat tow set up. And that completes our look at CURT's S-Hooks with safety latch..

Customer Reviews

Curt S-Hook with Wire Keeper for Safety Chains and Cables - 3/8" - 2,000 lbs - C81810

Average Customer Rating:  4.7 out of 5 stars   (24 Customer Reviews)

This durable S-hook lets you easily connect a safety cable or chain to your tow vehicle or trailer. Sturdy, zinc-coated steel hook measures 3/8" in diameter and has a wire keeper.


I needed S-hooks for the ends of the safety chains I was replacing on a boat trailer. These hooks have been great. I was able to close the end of the S that attaches to the chain using a large vice and the spring loaded safety hook insures that the chains stay attached to my vehicle hitch.


Great service had what I was looking fo r.


Serves it's purpose


Easy to connect to trailer safety chains. Bought for wire keeper feature which is excellent.


We order a lot of stuff from etrailer they ship when they say they do. There prices are great and there services are like know other. Keep up the good work. We’re be ordering a lot more from etrailer in the feature. Thanks


Product was fine (pretty standard s-hook), but more importantly the service was great. Had a SNAFU with the on-line ordering, so called customer service and the folks made it right. Have always had very good service from etrailer.


CON: Spring position is higher up the clip limiting size of opening that can be clipped to.
PRO: heavy duty, thicker spring.


Great hooks and easy to install


This is my second time purchasing from etrailer and both times I have experienced the best customer service and excellent logistics.


Product was delivered extremely fast and the product was outstanding quality! Would highly recommend doing business with them!


Perfect for a quick connect/disconnect!




Excellent product. Have owned for a year with zero problems at all. Very durable clamp. Would buy again.


The hooks are just as described and were delivered by mail which took a little longer than I expected.l




It's a simple item and I got what I wan ted.


Good delivery, good merchandise, fair price. Thank you!


This is a good product at a reasonable price


worked great


Great S hooks




exactly as as described



See what our Experts say about this CURT Accessories and Parts

  • Method for Crimping Safety Chain Hook onto Safety Chains
    It is not advisable to use a hammer on an item like the Curt # C81810 as this can weaken the link and cause it to fail when under load. A better option is to use a vice which can apply gradual pressure to close the link. It sounds like a better option for you might be to use a safety chain quick link, such as Curt # C82932. This has a threaded connector to allow easy installation and removal when necessary. This link is rated for 3,300lbs safe working load rating and 16,500lb break strength...
    view full answer...
  • Replacement S-Hooks for Trailer Safety Chains
    We can offer you replacement S-hooks with keepers for your trailer's safety chains. You'll just need to find a suitable saw (or helper who can bend the S hook open) to remove the old ones. We have S-hooks in 7/16-inch size # C81820, 17/32-inch # C81830 and 3/8-inch # C81810. You can certainly use a clevis hook like # 6495-301-04 or a Quick Link such as # BX229-0512 if you prefer these over the S-hooks. Cutting your chains down to the correct length will not reduce their capacity so long...
    view full answer...

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Info for this part was:

Employee Frances L
Edited by:
Frances L
Employee David L
Written by:
David L
Employee Jacob T
Video Edited:
Jacob T
Employee Adam R
Expert Research:
Adam R
Employee Dustin K
Video by:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee David F
Installed by:
David F

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