bing tracking image
  1. Accessories and Parts
  2. Redline
  3. Trailer Spindles
  4. Spindle Nut
  5. 1 Inch I.D.
Replacement Trailer Spindle Jam Nut

Replacement Trailer Spindle Jam Nut

Item # 6-191
Our Price: $4.57
Accessories and Parts
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.13 lbs
In Stock
Redline Spindle Nut Accessories and Parts - 6-191
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images


Need help with installation?
Locate installers near me
Replace a lost or damaged trailer spindle jam nut with this equivalent part. 1-833-496-1390 to order Redline accessories and parts part number 6-191 or order online at Free expert support on all Redline products. Great prices and Fastest Shipping for Replacement Trailer Spindle Jam Nut. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (14)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Accessories and Parts - 6-191

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

Replace a lost or damaged trailer spindle jam nut with this equivalent part.


  • Replacement trailer spindle jam nut
  • Fits 2,000-8,000 lb. axles with E-Z Lube spindles
  • Diameter: 1"-14

6-191 Replacement Trailer Spindle Jam Nut

Video of Replacement Trailer Spindle Jam Nut

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

Video Transcript for Review of Redline Replacement Trailer Spindle Jam Nut - 6-191

Hi everybody, Andy here with, and today, we're gonna take a quick look at this Replacement Trailer Spindle Jam Nut. This is going to replace a lost or damaged trailer spindle jam nut, and it fits 2,000 to 8,000 pound axles with the easy lube spindles. And let me pull out my ruler here and just give you some quick measurements. The inner diameter is right at one inch with a 14 fine thread, and then the outer diameter, I'm gonna get it as close as I can to the widest point, we're sitting right at an inch and three quarters across, and then the thickness, we're sitting right at about half an inch. Well, that's gonna conclude our 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

Replacement Trailer Spindle Jam Nut - 6-191

Average Customer Rating:  4.7 out of 5 stars   (14 Customer Reviews)

Replace a lost or damaged trailer spindle jam nut with this equivalent part.


Exactly what I needed. Good quality.


Still working


has performed as expected would buy aga in


Was an emergency repair for an out-of-state customer. Never heard back, and everything seemed to go well...


Was an emergency repair for an out-of-state customer. Never heard back, and everything seemed to go well...


Easy swap











See what our Experts say about this Redline Accessories and Parts

  • Thread of Spindle Nut 6-191
    I checked with the manufacturer, and the thread is 1" - 14 fine thread for the Replacement Trailer Spindle Jam Nut # 6-191.
    view full answer...
  • Available Sizes of Spindle Jam Nuts
    We offer a couple of spindle jam nuts, part # 6-191 that you referenced which has an inner diameter of 1-inch, and part # 6-96 which has an inner diameter of 1-1/2-inches. We do not offer any with an inner diameter of 1-1/4-inches.
    view full answer...
  • Axle Size Nut Retainer 6-190 Fits
    The Replacement Nut Retainer for 6-191 Jam Nut # 6-190 fits Replacement Trailer Spindle Jam Nut # 6-191 which fits 2,000 lb to 8,000 lb axles with E-Z Lube spindles. That means it will fit your 5,200 lb axle if it has an E-Z Lube spindle.
    view full answer...
  • Replacement Spindle Jam Nut for EZ Loader Boat Trailer with Grease Zerk at End of Spindle
    The thread diameter of spindle jam nut # 6-191 is 1 inch. If you do need a 3/4 inch then this nut will not work, though it is for EZ lube spindles that have the grease zerk at the end. We do not have a 3/4 inch jam nut. The closest match is a 7/8 inch castle nut # 165931. You can double check the measurement by using dial or digital calipers to measure the diameter of the threaded part of the spindle. It if turns out to be 1 inch then you can use # 6-191.
    view full answer...
  • Parts Needed To Convert 3,500LB Dexter Axle MFG After 06/02 To Newer Spindle Nut Retainer
    The Dexter retainer kit K71-622-00 will allow you to convert your 3,500lb axle manufactured after 6/2002 to use the new retainer. While we do not have this kit we do carry all the parts of the kit. You will need 2 of the Nut Retainers # 6-190, 2-D Washers # 5-23 and 2-Spindle Nuts # 6-191.
    view full answer...
  • Replacement Spindle Nut Retainer For a Dexter 8,000LB Trailer Axle
    The Nut Retainer # 6-190 is commonly used with the Spindle Jam Nut # 6-191 on newer Dexter 8,000lb trailer axles. We also have the Spindle Washer # 5-101 if that is the type of retainer that your spindle uses.
    view full answer...
  • Compatibility of the Redline Nut Retainer for the Redine 1 Inch Nut
    The Replacement Nut Retainer Jam Nut, # 6-190, is designed to fit the 1 inch Trailer spindle nut that fits the 2,000 lbs to 8,000 lbs axles with E-Z Lube spindles. The kit you referenced, # RG05-100, will include the same # 6-190 jam nut retainer and # 6-191 jam nut. The actual thread size on the spindle is 1 inch. The jam nut and the retainer measure 1 inch to fit the 1 inch threads on the spindle.
    view full answer...
  • Retaining Nut For Dexter Hub & Drum 5,200 lb - 6,000 lb Part 8-201-9UC3-EZ
    The retaining nut for the Dexter Trailer Hub and Drum Assembly - 5,200-lb and 6,000-lb E-Z Lube Axles - 12" - 6 on 5-1/2 # 8-201-9UC3-EZ is a 1"-14 size nut. The nut is the Replacement Trailer Spindle Jam Nut # 6-191.
    view full answer...
  • Installation of Electric Brake Replacement Assemblies on Wells Cargo Dual Axle Trailer
    When installing electric brakes on your Wells Cargo tandem axle trailer, you will want either the Electric Trailer Brake Kit - Self-Adjusting - 12" # AKEBRK-7-SA or the 10" # AKEBRK-35-SA. You can simply put a tape measure on your hub to see which one you need. I've attached videos of the installations to assist. It is just as common for assemblies not to use a cotter pin and it is for them to use a cotter pin on that spindle nut. Some will use a castle nut like # 165686 with the cotter...
    view full answer...
  • Replacement Washer for an EZ Lube Trailer Spindle
    EZ lube spindles generally use a tang washer to prevent the castle nut from turning. There are different sizes available depending on what is needed. For example, # 5-101 has an inner diameter of 1 inch. Washer # 5-71 has a different design and a 1-1/2 inch inner diameter. Washer # 5-59 is similar but larger with a 1-3/4 inch inner diameter. Sometimes you will see a D-shaped opening on an EZ spindle washer such as # 5-23. On this one the distance from the straight edge to the furthest...
    view full answer...
  • Spindle Nut Size For EZ Lube Axles
    The Trailer Idler Hub Assembly for 3,500-lb E-Z Lube Axles - 5 on 4-1/2 - Galvanized # AKIHUB-545-35-G-EZ-K does not come with the spindle nut. That would come with your axle. For a 3,500 lb axle you would want the Spindle Nut Kit for EZ Lube Axles # RG05-100. The Nut is a 1 inch nut with 14 threads. The socket or wrench needed for this is 1-1/2 inch. If you just want the nut # 6-191. For the retainer # 6-190.
    view full answer...

Do you have a question about this Accessories and Part?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Adam R
Expert Research:
Adam R
Employee Adele M
Updated by:
Adele M
Employee Laura H
Written by:
Laura H
Employee Andy C
Installed by:
Andy C

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-833-496-1390