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Trailer Spindle Nut 1"

Trailer Spindle Nut 1"

Item # 165686
Our Price: $10.95
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TruRyde Trailer Spindles - 165686
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Castle nut for 1" spindles. Bare metal finish. 1-800-940-8924 to order TruRyde accessories and parts part number 165686 or order online at Free expert support on all TruRyde products. Great prices and Fastest Shipping for Trailer Spindle Nut 1". Accessories and Parts reviews from real customers.
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TruRyde Accessories and Parts - 165686

  • Trailer Spindles
  • Spindle Nut
  • TruRyde
  • 1 Inch I.D.

Castle nut for 1" spindles. Bare metal finish.


  • Castle nut for 1" spindles
  • Bare metal finish


  • Size: 1" diameter x 0.532" tall
  • 14 Threads per inch

FA-SN100 TruRyde Trailer Spindle Nut - Raw

Video of Trailer Spindle Nut 1"

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

Video Transcript for Review of TruRyde 1 Inch Diameter Trailer Spindle Castle Nut - 165686

Hi, everybody. Andy here with And today we're just gonna take a very quick look at this trailer spindle nut. This bare metal finish castle nut is for one-inch spindles. So it has to have one inch in diameter, and the overall height, just to be very specific, is gonna be 0.532 inches tall, and this is 14 threads per inch. And that's gonna conclude our brief look today.

I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me..

Customer Satisfaction Score:

Customer Reviews

Trailer Spindle Nut 1" - 165686

Average Customer Rating:  4.8 out of 5 stars   (397 Customer Reviews)

Castle nut for 1" spindles. Bare metal finish.


exact replacement, they shipped it fast,always great prices and in stock,

I just Rebuilt my trailer using etrialer for all the parts, brake lights bearings winch,they even had all the parts to rebuilt the hyd actuator


good quality and a good price. perfect fit


Worked out great when needed during a roadside repair.
Already ordered another backup.


Arrived as promised in good shape


Fast delivery of exactly what I ordered (many items).


Great service, good price and fast deli very.


Definitely a nut.


It’s a nut


Fit as advertised


great website, easy to order from, quick shipping! Customer Service is quick to respond to questions



Worked perfect


Just what we wanted!!!


Need them quick and they made it happen a day sooner than expected … Thank you


Did not fit axle spindle so I'll be returning the 2 nuts. Had to get correct size locally so I could finish assembly.


Worked very well. On a difficulty scale of 1-10, with 10 being the hardest, this was a 3.


After being in storage, in a field, for more than 2 years, Water had contaminated the original hub, pitting the bearings and races and they had not been serviced since, at least 1999. I polished up the EZ lube spindles, flushed out the old grease and I was ready. Everything fit perfectly. It was aa perfect match. Used new Nuts and Washers. re-installed the Wheels and Tires, Torqued to 90-10lb. The old 6 x 4 Wells Cargo trailer is once again Ready for the coming rendezvous season.


Thanks for getting it shipped so quickly - well done!


The products appear to be ok. I would give the products 4 out of 5 stars. The 2 star rating is because of the poor shipping.

I ordered 2 leaf springs, 2 spindle nuts and 3 spindle washers. The first box showed up quickly (3 days) but it only contained 1 leaf spring. I called etrailer and they shipped a second leaf spring. After 5 days the package was at my local UPS distribution center but the tracking info said the package had been damaged and ups was contacting the shipper. I found out from ups that the spring had come out of the box, and they did not know who to deliver the spring to. I called etrailer again to discuss the damaged package but etrailer would not ship another spring until the damaged box/loose spring mystery was solved. Another week passed. I finally got the second leaf spring today, but it took about 3 weeks from the initial order date.


Brake Drum/Hub unit and associated parts arrived quickly and in great shape! Waiting for warmer weather to install. Have used e-trailer parts before to rebuild all brakes, hubs and bearings on camping trailer last summer but over-torqued one bearing set and had an outer bearing failure - almost lost the wheel! This unit will replace that damaged hub which was gouged by riding on the washer and spindle nut causing grease cap not to seal and leak grease. These parts are first class and fit and install perfectly!

John M.


Replaced old hub, bearings and castle nut. Everything working well - no problems and fit was perfect! Ill use etrailer everytime!


Great products and fantastic customer service,they really go out of their way to try to help you get the correct parts,delivery is fast.


quick service good prices


Very quick shipping and great communica tion!


First off I purchased 1" castle nuts, tang type spindle washers and 2 wheel hubs for a 3500 lb tandem trailer. I wish I had pictures during the assembly but I don't, however these parts all assembled perfectly. The hubs were pre-greased, so all I did was use brake cleaner on the wheel spindles to clean up, the hubs slid on with no problem, the tang washers fit perfectly and the castle nut threaded on with ease, the hub included new lug nuts which made the whole repair a breeze! Very pleased with the purchase and ease of assembly, I was going to piece out the bearings and races but for the price of a complete hub it made more sense to buy it already greased and assembled. E trailers videos and instructions are great to consider before attempting to install the parts.


Mike H. Was really helpful & knowledgable . Thx for all ur help !


Great product and great price fast shipping, cking on price for tires and rims now

Tim H.


they worked out great. Thanks for taking the to ck. looking for a way to mount spare tire to 18 ft open car trailer. Thanks

Etrailer Expert

Rachael H.


Thanks for the reply and follow up. I have included a link to all our spare tire carriers, I am not sure how you car hauling trailer is configured or what you mounting options are, but here is what we currently offer.

Show More Reviews

See what our Experts say about this TruRyde Accessories and Parts

  • Replacement Idler Hub For a BTR Spindle On an Enclosed Trailer
    You will need 2 of the Easy Grease Trailer Idler Hubs # AKIHUB-545-2-LFEZ-2K for your trailer hubs. This hub fits on your Spindle # TRU27FR and will include new bearings, races, a grease seal, grease cap, and new lug nuts. As you have an EZ grease spindle you will not have a cotter pin. Instead you will have a Tang Washer # 5-101 that holds on the Castle Nut # 165686 and Washer # 5-23.
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  • Spindle Nut to Use with Spindle TRU27FR
    The correct spindle nut to use with the spindle part # TRU27FR is the part # 165686.
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  • Depth Measurement For Hubs That Fit A 1" Straight Spindle
    We do have hubs available for a 1" straight spindle in part # AKIHUB-440-2-EZ-1K. This hub measures 4-1/4" deep so it will run a bit longer than the hub you are looking for. There are a total of 4 hubs that we carry for a 1" straight spindle and all 4 would be identical as far as depth. A lot of these older boat trailers use hubs that are trailer specific, and it may prove very difficult to find. We do carry replacement spindles like part # TRU59FR, if you want to change it out for a more...
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  • Correct Hubs-Drums and Brakes for Lippert 3,500 lb Spindle
    The Lubed 4" Drop Spindle with Brake Flange for 3,500-lb Axle # LC12338, uses standard 10" diameter hubs and brakes, for which we have the Electric Trailer Brake Kit - Self-Adjusting - 10" - Left and Right Hand Assemblies # AKEBRK-35-SA. For the brake mounting hardware (nuts and lock-washers) you can use part # BRKH10B. The most common hub-drum assembly for this application is part # AKHD-545-35-EZ-K, with a 5 on 4-1/2 wheel bolt pattern. However, depending on the wheels you plan on using,...
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  • Correct Bearing/Race and Castle Nut Kit for 1 Trailer Spindle
    It sounds like you're looking for the Bearing Kit with Grease Cap for 1" BT8 Spindles part # DL21792 which comes with two bearings, two races, a grease seal, cotter pin, and grease cap. It has everything you need for one side of an axle. It doesn't however come with a castle nut so for that you'd need the Trailer Spindle Nut 1" part # 165686.
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  • Replacement Bearing Kit, Spindle Washer, & Nut For 5,200 lb Lippert Trailer Axle
    We do have the correct bearing kit, along with the spindle washer and nut for your Lippert 5,200 lb axles. What you need are the following: - Bearing Kit # BK3-300 - Trailer Spindle Nut # 165686 & Washer # SW1000
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  • Replacement Hub and Drum Assembly and Electrics Brakes for a Dexter P-11 SLR Axle
    Thanks for the pictures! I reached out to Dexter and got some information about your axle. You will need the Easy Grease Trailer Hub and Drum Assembly for 3.5K Axles - 10" - 5 on 4-1/2 - item # AKHD-545-35-EZ-K for replacement hubs. These come with all bearings and seals necessary. They are sold individually. For your brakes you will need the Dexter Electric Trailer Brake Assembly - 10" - Right Hand - 3,500 lbs item # 23-27 and the Dexter Electric Trailer Brake Assembly - 10" - Left Hand...
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  • Replacement for Missing Spindle Washer Used with Bearing Kit BK1-150 and Castle Nut
    Your spindle should have a Washer # SW1000 between the outer bearing and the Spindle Nut # 165686. As this part is typically always reused that is the reason it is not included in the Bearing Kit # BK1-150. Instead we only include the cotter pin and D-washer since the cotter pin and D-washer can break. You will be able to discard the D-washer since you have the castle nut style spindle and do not need that part.
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  • Why Do Some Spindles Use Cotter Pins and Others Use a Tang Washer?
    The #42 Spindle # TRU57FR does come with a Standard Washer # SW1000, Cotter Pin # 165649, and Castle Nut # 165686 to secure the hub to the spindle. The D-Washer # 5-23 and Tang Washer # 5-101 were created to allow for a Grease Zerk # LC44XV to fit the end of the spindle and allow you to grease the hub bearings without removing the hub. There are some versions using a grease zerk and cotter pin but those are more likely to not allow grease to reach the bearings as it can come out the cotter...
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  • Does 84 EZ Lube Spindle TRU77FR Come with Castle Nut
    The #84 E-Z Lube Spindle w/ Brake Flange for 3,500-lb Trailer Axles Item # TRU77FR does not come with a castle nut so you'd need to order that as well with part # 165686.
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  • Availability of a Replacement Castle Nut for Trailer Spindle
    We have a few options that could work for you, but you will need to measure the threads of your spindle to determine which would work. For a 1 inch spindle nut you would need the part # 165686, for a 7/8 inch nut you would need part # 165931. These are the two most popular sizes.
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  • Bearing Kit for Dexter Trailer Axle D52
    The D52 on your axle tag means it is a 5,200 lb axle. For a kit that has all of the bearings and seal for your Dexter D52 5,200 lb axle you'd want the kit part # BK3-310 and then for a spindle nut you'd want the # 165686. Aside from that the other interesting piece of info that is on the tag is the hub face to hub face dimension is 86 inches and spring seat center to center is 68.5 inch. You'd need this if you ever had to replace the axle.
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  • Replacement Hub Components For Drift Boat Trailer With BTR Spindle
    I do see you previously purchased the Easy Grease Trailer Idler Hub # AKIHUB-545-2-LFEZ-2K. This uses the Bearing Kit # BK1-150 if you only need the bearings and seals. Otherwise you also got a Spindle Nut # 165686, Spindle Washer # 5-101, Washer # SW1000 and Cotter Pin # 165649
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  • What Is The Tread Size For The # 42 Spindle?
    The #42 E-Z Lube Spindle w/ Flange # TRU37FR has a 1"-14 thread size. A replacement Trailer Spindle Nut # 165686 is available if the treads are damaged on the castle nut.
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  • What are the Inner and Outer Diameters of the TruRyde Trailer Spindle Nut
    I pulled the TruRyde Spindle Nut, # 165686, and took some measurements for you. This nut has an inner diameter of .93 inches and and outer diameter of 1.45 inches. This spindle nut is designed to fit all spindles that accept a 1 inch nut. I have attached a photo of the measurements I took for you and a photo of where to measure on your spindle to see if this nut will fit.
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  • Should There Be a Washer on Trailer Spindle Between Spindle Nut and Outer Bearing
    There really should be a flat washer between the outer bearing of your hub and the nut that holds it on. The washer protects the back side of the bearing from the edges and points on the back side of the spindle nut. The Washer For 1 inch Spindle, # SW1000, is typically used on spindles that have a castle nut, like # 165686, and a cotter pin, # 165649. A D washer, # 5-23, would be used on a spindle that has a flat side and uses the same castle nut and cotter pin setup. A Tongue Washer,...
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  • Torque Rating for Spindle Castle Nut
    When installing the castle nut on the end of the spindle, there is no specific torque rating. The nut is ran down until there is no side to side play in the hub, and then backed off to the next notch in the castle nut so the tang washer or cotter pin can secure the nut. Over-tightening the castle nut can damage the bearings, races and spindle. If you click on the video link I provided, and fast forward to the 4:45 minute mark, you can see the procedure.
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  • Nut Size Used on Dexter 3500 lb Hub and Drum Assembly
    The Dexter Trailer Hub and Drum Assembly - 3,500-lb E-Z Lube Axles - 10" - 5 on 4-1/2 - Galvanized # 8-247-50UC3-EZ uses 1/2 inch studs so the lug nuts will be 1/2 inch inner diameter and 13/16 inch outer diameter like # CE11051. If instead you are looking for the spindle nut # 165686 is the correct fit along with cotter pin # 165649. The Spindle Nut Kit for EZ Lube Axles # RG05-100 is what you want if you have the D-shaped spindle. These have a 1-7/16 inch outer diameter and a 1 inch...
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  • Do I Need a Washer with Castle Nut to Install Dexter Trailer Idler Hub Assembly for 2,000-lb Axles
    Personally, I would install the Dexter Trailer Idler Hub Assembly for 2,000-lb Axles # 8-91-05UC1 and add the Washer # SW1000, Spindle Nut # 165686, and Cotter Pin # 165649 as that's how we usually install them here at etrailer and it makes sense to me to have that smooth surface between the castle nut and bearing. If you spoke with Dexter directly and they said that the washer isn't needed then you should be just fine without it, I just feel like it will keep everything running a bit...
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  • 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.
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  • Thickness of Castle Nut 165686
    The thickness of the castle nut part # 165686 that you referenced is 1/2 inch.
    view full answer...
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  • 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...
    Image 1 for
  • Replacing A Castle Nut On An Axle Rated For 2,500 Lbs
    It appears you need a spindle nut. We have a couple of options for you to work with your 2,500 lbs axle: The Trailer Spindle Nut 1", part, # 165686 and the Washer For 1", part # SW1000 Replacement Trailer Spindle Jam Nut, part # 6-191 and the Replacement Nut Retainer for 6-191 Jam Nut, part # 6-190 They each have 14 threads per inch and work with axles with 1" spindles. Each spindle nut needs either a washer or a nut retainer. If your spindle uses a cotter pin, you will need the first...
    view full answer...
  • Spindle Nut Recommendation for 84 Spindle
    For your 84 spindle the correct nut would be # 165686 which is a 1 inch spindle nut.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Andy C
Installed by:
Andy C

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