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Cotter Pin - 1/8" Thick x 1-3/4" Long

Cotter Pin - 1/8" Thick x 1-3/4" Long

Item # 165649
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Cotter Pin - 1/8" Thick x 1-3/4" Long Cotter Pin 165649
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1-3/4" Long cotter pin locks a castle nut (sold separately) in place. 1-800-940-8924 to order ABS Fasteners accessories and parts part number 165649 or order online at Free expert support on all ABS Fasteners products. Great prices and Fastest Shipping for Cotter Pin - 1/8" Thick x 1-3/4" Long. Accessories and Parts reviews from real customers.
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ABS Fasteners Accessories and Parts - 165649

  • Trailer Leaf Spring Suspension
  • Cotter Pin
  • ABS Fasteners

1-3/4" Long cotter pin locks a castle nut (sold separately) in place.


  • Cotter pin locks castle nut (sold separately) in place
  • Dimensions: 1-3/4" useable length x 1/8" wire thickness
  • Overall length: 2-1/4"
  • Quantity: 1 pin

13N175PCO0M Cotterpin 1/8" Thick x 1-3/4" Long

Replaces 101200, 165649, and 019-002-00

Video of Cotter Pin - 1/8" Thick x 1-3/4" Long

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

Video Transcript for Review of ABS Fasteners 1-3/4 Castle Nut Cotter Pin - 165649

Hi there, I'm Michael with Today we're gonna take a quick look at this one eighth of an inch cotter pin. This is going to help to secure your castle nut, so that you don't have to worry about that castle nut coming off. So each arm of this pin is about one sixteenth of an inch, so when you have them combined there, it is gonna be one eighth of an inch. As far as our length goes, our overall measurement, we're looking at right two and a quarter of an inch there. Our usable length from the inside of that bend to the shorter arm, is going to be right at, call it one and three quarters of an inch.

So this is going to be made of a rough steel construction so it should do a really good job for you making sure that castle nut stays in place so that you don't have to worry about that coming off. So if you are needing a replacement one eighth inch thick cotter pin, this is going to do a great job for you. You are just gonna get the one pin with this part number so if you need multiple, obviously just increase your quantity. So that's gonna complete our look for today. Again, I'm Michael with, thanks for watching..

Customer Satisfaction Score:

Customer Reviews

Cotter Pin - 1/8" Thick x 1-3/4" Long - 165649

Average Customer Rating:  4.8 out of 5 stars   (488 Customer Reviews)

1-3/4" Long cotter pin locks a castle nut (sold separately) in place.


We have a 2022 Forest River Forester 2551DSLE. Unfortunately it really doesn't come with a usable spare tire holder or a spare for that matter. It had a 4" steel bolt pointing straight down that would be completely worthless. No way I'd be strong enough to get a 75lb tire up there. After lots of measuring this was my only solution. BAL makes 2 products but neither would fit. I mounted 2 X 1" square aluminum bars for the tire to rest against. The winch itself mounted with 2 5/16 stainless hex bolts with nylon topped nuts to keep them from coming loose. The round bar that winches the tire into place uses a 1/8" cotter pin to hold it in place. The hole for the cotter in the bar was drilled in the wrong place so I had to cut off about 1/4" of the tube to get it to fit. I used an original Ford 16" wheel for an e450. The fitting that holds the wheel is about 7". Make sure it is centered as you winch the tire into place. Once up and properly in place it seems secure. Hopefully this will solve our problem of no spare. I would have given this 5 stars if everything would have lined up out of the box. The winch itself seems to be pretty heavy duty and this is the kind of thing that hopefully won't need to be used that often.


Just repacked bearings with new seals on my 4' x 8' folding utility trailer. Customer service was great in helping me with selecting the right parts including cotter pins. All is good now. I have been ordering from etrailer for 10 + years. Great place with great people!

Skip P - 08/02/2021


Made in USA - Dexter rotor’s & disc pads - definitely fit my truck

Tommy - 02/21/2023


I purchased my KZ Sportster 3 1/2 years ago new and never had to use the spare. I recently decided to drop the spare and inspect it when to my surprise I discovered that the extension rod was not installed. The dealer told me it must have come that way and KZ told me the dealer must have removed it. etrailer delivered it to me two days after ordering it and 5 minutes later I had it installed. At least etrailer is concerned about customer satisfaction and I appreciate the quick response and quality product.


Product is fine but packaging was a joke. A very large box was used and only a small amount of kraft paper was used as cushioning. Six to eight of the brake assemblies could have been put in this box. Fortunately there was no damage to my assemblies. I thought that surely this would have been corrected given the number of people that have complained about it. I guess the complaints are not getting to the correct person with the authority to make a change.


Ed W was fantastic at helping me sort out exactly what I needed for my project. Ed also followed up once he was notified the package was delivered! Very happy with the support and knowledgeable staff. etrailer is at the top of list of places to purchase.


Well I'm sorry to inform you that when I opened the box. I had a left kit, a right kit and an empty bag. After looking in the box closer under the flaps I found a washer and a nut. That was all.

Customer Service will reach out to you.
-- Etrailer Expert Sierra K - 10/19/2021
Customer Service will reach out to you.
-- Etrailer Expert Sierra K - 10/19/2021


Great trailer hitch, fit perfectly for my van. Great quality...highly reccomend!


Items ordered were delivered very quickly, just a couple days. they fit well and as described. I will certainly order more items from etrailer.


Good quality, arrived more quickly than predicted, packaging seemed to be adequate to protect the product. thanks!


It's a cotter pin!


Love the video to assist with installat ion


Roger was so helpful in putting together a complete bearing kit from parts. Not many other places would take the time to sort out all the parts that normally come in a kit, that was unavailable. The OTER GUYS just tell you, sorry "supply chain issues-nothing I can do" I highly recommend etrailer. Ive been doing business with them over 10 years.


Top shelf products...and Will was absolutely terrific to work with...5 stars really isnt enough...if you have a trailer that needs help, call these wont be disappointed !!


Nice upgrade of the axle on my [online] trailer. I had no confidence towing my home made teardrop camper until I installed this axle. The package was damaged in shipping and eTrailer quickly replaced the missing parts.


I really appreciated the prompt teaching info and they went above to let me know that it was delivered.


Not much to say about cotter pins! Saved me a trip to the auto parts store!


It's a cotter pin it work great for its intended purpose.


It’s a cotter pin. The correct one for axle crown nuts.


Hubs were well made and delivered quickly. The guides and videos are super helpful in finding the correct parts.


It's a simple item, but nice to have a new pin to use instead of trying to reuse a bent one!


Outstanding service, excellent products and the best prices I have found. Absolutely no complaints.


It’s a cotter pin. Four stars for service and quick delivery.


Great product, fast shipping! The brakes are perfect for our Airstream; I only wish that I spent the extra for self adjusting brakes


What's to tell, they bent into position, they are cotter pins.

Show More Reviews

See what our Experts say about this ABS Fasteners Accessories and Parts

  • Can I Use the Dexter Cotter Pin on a Lippert Axle
    The Cotter Pin # 165649 can be used on a Lippert axle, so as long as you're replacing a cotter pin with a 1/8" diameter and 1-3/4" of usable space, this will work just fine for you. If your pin has different dimensions, just let me know what you're looking for and I can help you locate a replacement.
    view full answer...
  • What Size Cotter Pin is Used with Replacement Axle Bolt Kit for Yakima Rack and Roll Trailers
    I went out to the warehouse and pulled Replacement Axle Bolt Kit # Y8880180 to measure the cotter pin in the kit. The pin is approximately 0.11 inches thick whereas the hole is just slightly larger than 0.125 inches (1/8). The pin has an overall length of 1.64 inches. For a replacement you could use # 165649.
    view full answer...
  • What is the Torque Rating for an Equalizer Bolt
    Equalizer bolts, like the TruRyde Wet Equalizer Bolt, # TRFA71063, should be torqued to yield. Equalizer bolts are not given a specific torque rating because they should allow some movement of the equalizer. If they are torqued down too tight, the equalizer will have difficulty moving and that could bind up your trailers suspension. Simply tighten the bolts down until they are tight, but still allow the equalizer to move. Keep in mind, the cotter pin is not included with this bolt. The...
    view full answer...
  • Correct Spindle Nut, Washer, and Cotter Pin for 7/8 Inch Diameter Spindle
    Yes, the Washer Spindle Tongue part # 165863 will work with 7/8" diameter spindles. If you also need the castle nut and cotter pin as well we have these available as part # 165931 and part # 165649.
    view full answer...
  • Torque Specs for Axle Spindle Nut, Suspension Hanger Bolts, and Lug Nuts for Trailer
    It looks like you might be asking about a few different torque specs so I'll address all of them separately. For a trailer axle spindle nut like part # 165686 you will need to run the spindle nut down until there is no more side-to-side play in the hub and then back it off to the next notch so you can secure the cotter pin, like part # 165649, through the spindle. When it comes to hanger bolts like the Redline # 166081 there isn't a specific torque rating either as you just need to make...
    view full answer...
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  • Cotter Pin Recommendation for Use with Convert a Ball Interchangeable Ball Set # 900B
    We have the cotter pin part # 165649 which would work great with the Convert-A-Ball Interchangeable Ball Set # 900B. This pin is a standard cotter pin like what the ball set uses.
    view full answer...
  • Correct Replacement Castle Nut, Cotter Pin, and Washer for Trailer with 1" Round Spindle
    The correct replacement castle nut, cotter pin, and washer for a trailer with 1" round spindle is as follows: Castle Nut part # 165686, Cotter Pin part # 165649, and Washer part # SW1000. Unfortunately, we can't cross-reference trailer mfg. part numbers but the above parts are fairly standardized so there will be no issues with compatibility.
    view full answer...
  • Where Does Flat Washer Go
    I was unable to find an order number so I'm not certain exactly what you are referring to, but in general a flat washer such as Washer For 1" Spindle # SW1000 will go between the outer bearing of your hub and the nut that holds it on, which essentially works to protect the bearing. These washers are used on spindles with a spindle nut such as Spindle Nut 1" # 165686 and Cotter Pin # 165649.
    view full answer...
  • Cotter Pin Replacement Part for 5,200 lb Axles
    We do sell the cotter pin separately from the Bearing Kit # BK3-310, you're looking for the Cotter Pin - 1/8" Thick x 1-3/4" Long # 165649.
    view full answer...
  • Recommended Replacement Castle Nut Cotter Pin
    Yes, you can use the Cotter Pin - 1/8" Thick x 1-3/4" Long # 165649 to replace your lost or broken castle nut cotter pin.
    view full answer...
  • Spindle Nut Kit Recommendation for a Dexter 6k Axle
    Since the D60 Dexter Axle uses a cotter pin and castle nut the # RG05-100 would not be the correct kit for you. For that I would recommend the Trailer Spindle Nut # 165686. For a compatible cotter pin I would recommend the Cotter Pin part # 165649. People use channel locks typically for installation and removal of these castle nuts since they don't really get torqued down and the length of the spindle prevents most standard sockets from being easily used.
    view full answer...
  • Spindle Nut Recommendation for a 3,500 lb Axle
    Since you have a 3,500 lb axle most likely the diameter of the threaded portion of the spindle is 1 inch. You will need to verify that. And since the spindle has a hole in it for a cotter pin you would need a castle nut. For that I would recommend the Trailer Spindle Nut # 165686. For a compatible cotter pin I would recommend the Cotter Pin part # 165649. The Spindle Nut Kit # RG05-100 that you referenced is for a different style spindle so I would not recommend it for you.
    view full answer...
  • Replacement Axle Nut for 3500 lb Boat Trailer Axles
    We have what you need! For EZ-Lube axles which are very common on boat trailers you want to use the Spindle Nut Kit for EZ Lube Axles part # RG05-100. This will have two nuts, washers and keepers. For the non EZ-Lube axles use the Trailer Spindle Nut 1" part # 165686 and the Cotter Pin part # 165649. these are individual so you will want two of each to have all you need. You can confirm these will fit on your axles by measuring your spindle and ensuring that your it has 1" threads on it.
    view full answer...
  • Recommended Axle/Spindle Nut for a #84 Spindle.
    We have exactly what yo need! If your axle has EZ lube hubs with a grease zerk on the end of it use the Spindle Nut Kit for EZ Lube Axles part # RG05-100. This kit has the washer, nut and keeper for both sides. For non EZ lube hubs use the Trailer Spindle Nut 1" part # 165686. This is just the nut so grab the amount you'll need and if you don't have them on hand pick up the same number of these Cotter Pin, 1/8" x 1-3/4" part # 165649
    view full answer...
  • Replacement Grease Seal for Trailer Hub that is OD = 1.98 ID = 1.25
    Thanks for the dimensions of your seals. Based on that the correct replacement would be the part # RG06-010 for a pair or part # 34823 for a single seal. We have replacement cotter pins like the part # 165649 which is steel but we do not have any stainless steel options.
    view full answer...
  • Grease Seal and Bearings Recommendation for 5200 lb Lippert Axle
    The bearings your Lippert 5,200 lb axle has are part # LM67048 and # 25580 and the grease seal is # RG06-070. For a cotter pin you'd need just the # 165649.
    view full answer...
  • Replacement Bearing Kit for 5,800 lb Lippert Axle
    What is the axle capacity that you have? We don't have an easy way to look up what you have with the info you listed but if you get me the axle info I can see what you may need.
    view full answer...
  • How To Use Bearing Kit for #84 Spindle with Round Spindle
    In regards to the Bearing Kit for #84 Spindle part # BK2-100, if you have a round spindle you'd simply reuse the flat washer and spindle nut that was already on the axle. If you need them we do offer them as the Trailer Spindle Nut part # 165686, the Washer part # SW1000, and Cotter Pin part # 165649.
    view full answer...
  • Replacement Spindle Washer, Castle Nut and Cotter Pin for Dexter Spindle
    The linked page displays all the trailer spindles we offer and specs including weight capacity and thread diameter. All spindles we offer have a 1-inch-diameter threaded portion that accepts a spindle washer like # SW1000 and a castle nut like # 165686. For a cotter pin you can use # 165649.
    view full answer...
  • Relocating Trailer Spare Tire Below A-Frame Of a 2020 Coachmen Apex Travel Trailer
    I have a couple options for you to consider. The first is the Fulton Economy Spare Tire Carrier # FETCLB0201 which works with 4 lug and 5 lug wheels and trailer frames up to 3" wide. This would make the tire sit offset on your A-frame. It will be harder to put on and remove the spare when that time comes due to the style of the carrier. I feel the Lippert Spare Tire Winch # LC159056 is your best option for usability. This will allow you to mount the winch on your frame and easily raise...
    view full answer...
  • How Much Torque Should I Put On Spindle Bolt On Dexter Trailer Hub and Drum Assembly # 8-285-9UC3
    For a trailer axle spindle nut like part # 165686 you will need to run the spindle nut down until there is no more side-to-side play in the hub and then back it off to the next notch so you can secure the cotter pin, like part # 165649, through the spindle. There is not a specific torque to follow for the nut. If you have any further questions please reach back out to me and I will be more than happy to further assist you in your towing endeavors.
    view full answer...
  • Which Cotter Pins Does Bearing Kit BK2-100 Use?
    I would be happy to help! First for extra cotter pins you will need the # 165649 which is what the # BK2-100 uses. I tried to cross reference the 680387 but it did not reference to any of the grease seals. The # BK2-100 includes a grease seal that has an I.D. of 1.719" and an O.D. of 2.565". You will need to use digital calipers like # PTW80157 to measure the spindle and hub of your Airstream to confirm which size grease seal you will need. If you find you need a different size grease...
    view full answer...
  • Recommended Spindle Nut and Washer To Use With Bearing Kit for #84 Spindles
    If you have Dexter EZ-Lube Axles, the Spindle Nut Kit for EZ Lube Axles part # RG05-100 is what you need most likely. Otherwise, the Trailer Spindle Nut 1" part # 165686 along with the Cotter Pin part # 165649 is likely all you need. The Bearing Kit for #84 Spindles part # BK2-100 does come with a tang washer already.
    view full answer...
  • Spindle Nut for Use with Trailer Hub # AKIHUB-545-2-LF-2K
    For a spindle nut to use with the hub # AKIHUB-545-2-LF-2K that you referenced the part # 165686 would be a great replacement. You'd also need a cotter pin if you didn't have one as well with # 165649.
    view full answer...

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Info for this part was:

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Employee Michael B
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