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Trailer U Bolt Kit for 3,500 lbs. 2 3/8' Round Trailer Axle 6 1/4' Long 1/2' Diameter, 3' Thread Pitch, for 1 3/4' Spring

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$30.99

$ 16 .99 $16.99

In Stock

About this item

  • For 3,500lbs round axle which axle beam dia 2-3/8"
  • 4 x 6 1/4" long U bolts, U bolts dia. 1/2", 8 x 1/2"-20 hex nuts, 2 x tie plates for 1-3/4" leaf springs
  • For 1-3/4" trailer springs, Torque (ft. lbs.) minimum 45 maximum 55
  • Durable steel construction. Resistant to rust and corrosion
  • Enhances performance of your braking system



Product Description

trailer u bolts
trailer u bolts
trailer u bolts

Jose F Hernandez
2025-09-03 09:32:38
I upgraded my leaf springs on my trailer from a 3 leaf to a 6 leaf. This set fits perfectly on the 6 leaf spring and is heavy duty compared to the galvanized u bolts in other kits. Galvanized bolts are not a thick as this kit and not forged steel. Good kit.SPARKWHIZ Trailer U Bolt Kit for 3,500 lbs. 2 3/8" Round Trailer Axle 6 1/4" Long 1/2" Diameter.
Igor Tkachenko
2025-08-19 14:23:03
Everything is great! I ordered this in the evening and at 7:30 AM I already picked it up from the locker at Love's truck stop.
michael s.
2025-08-10 12:19:27
Put these on with no problems. Worked for their intended purpose.
David miller
2025-08-04 12:55:29
Nice and heavy duty fit good for my trailer axle
Julesof 6
2025-07-25 11:57:04
Works perfectly!
Customer
2025-07-04 18:21:43
Worked very well
Leslie
2025-06-24 18:40:36
The bolts were on the wrong way took us a while to undo them and fix them before we could actually fix our trailer. It was very tedious since we didn’t have the correct tools to do so and had to purchase them.
Curtis Hall
2025-06-08 10:55:31
Installed the U bolts and when I put the nuts on by hand, they went on about 2-3 complete turns. The nuts have an indent on 2 sides so I figured they are locknuts. After pulling the nuts back off it was obviously the nuts and bolts thread don't match. Also the metal is not rust resistant whatsoever. After first rain there was surface rust. I would hate to see what the ubolts look like after a couple of years.
Cody
2025-06-05 11:06:15
Good set of bolts for the money.
Jose F Hernandez
2025-05-23 11:55:51
I upgraded my leaf springs on my trailer from a 3 leaf to a 6 leaf. This set fits perfectly on the 6 leaf spring and is heavy duty compared to the galvanized u bolts in other kits. Galvanized bolts are not a thick as this kit and not forged steel. Good kit.SPARKWHIZ Trailer U Bolt Kit for 3,500 lbs. 2 3/8" Round Trailer Axle 6 1/4" Long 1/2" Diameter.
Igor Tkachenko
2025-03-03 16:08:57
Everything is great! I ordered this in the evening and at 7:30 AM I already picked it up from the locker at Love's truck stop.
michael s.
2025-02-24 18:24:38
Put these on with no problems. Worked for their intended purpose.
David miller
2025-02-11 15:44:23
Nice and heavy duty fit good for my trailer axle
Julesof 6
2025-01-22 19:37:32
Works perfectly!
Customer
2025-01-19 16:00:18
Worked very well
Leslie
2025-01-08 11:41:31
The bolts were on the wrong way took us a while to undo them and fix them before we could actually fix our trailer. It was very tedious since we didn’t have the correct tools to do so and had to purchase them.
Curtis Hall
2024-12-16 13:28:28
Installed the U bolts and when I put the nuts on by hand, they went on about 2-3 complete turns. The nuts have an indent on 2 sides so I figured they are locknuts. After pulling the nuts back off it was obviously the nuts and bolts thread don't match. Also the metal is not rust resistant whatsoever. After first rain there was surface rust. I would hate to see what the ubolts look like after a couple of years.
Cody
2024-11-15 13:34:58
Good set of bolts for the money.