Torque Specs for Nuts that Come with 1-1/2" Square Trailer U-Bolts # SP01-120

Question

Question:

Hi, I had bought these parts. The U-bolt 1 1/2inch W/nuts 2 Pack part #SP01-120 and U-bolt Plate - 1-1/2inch Square Axles W/1-3/4inch Wide Springs part #115983. Do you know what the specified torque is for the U-boat nuts?

asked by: Michael C

0

Expert Reply:

Yes, my contact at Redline said the nuts that come with the 1-1/2" Square Trailer U-Bolts # SP01-120 should be torqued anywhere between 45-75 ft-lbs.

expert reply by: Jon G

0

Answer 1

If the U-bolts are 9/16 inch diameter, the torque specs should be between 65 to 95 foot lbs. If the U-bolts are 3/8 inch diameter, the torque should be between 30 and 50 foot lbs.

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Answer 2

I have attached for you below some common torque values needed for a trailer suspension system but a lot of these will vary by bolt size and other factors. U-Bolts: Varies by Size - 1/2" bolts: 45 ft/lbs - 70 ft/lbs, 9/16" bolts: 65…

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Answer 3

For the 1/2 inch lugs with your 8 inch wheels, you will want to use a torque range of 75 to 85 ft-lbs. I have also attached a helpful image that breaks down the different torque specifications depending on the wheel size/type and stud size that you…

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Answer 4

I attached a chart that has all of the recommended lug nut torque specs for trailer wheels. Based on your studs being 1/2 inch, your wheels being 15 inches in diameter, and your lug nuts being coned you would want to torque your lug nuts to 90-120…

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Answer 5

The 1-1/2" Square Trailer U-Bolts #SP01-120 is not galvanized and we don't have any in this size that are.

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Answer 6

You will want to choose the diameter size of U-Bolts you need by the axle type (round, square) and the axle diameter. The Redline 2 Inch Square Trailer U-Bolt, part #SP01-160, you have referenced is for a 2 inch square axle. It is a 9/16 inch…

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Answer 7

The B78-13ST is an obsolete tire size that's no longer used. A 175/80-13 is the closest modern tire size. The #AM10210 tire you looked at is a 175-80-13 with a D load range radial tire that has a 1,610 lb capacity at 65 psi. You'll want to…

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Answer 8

If the trailer wheels scrubbed (dragged and scrapped the ground instead of rolling) when jack knifed then it could have thrown something out of alignment or damaged something. First, inspect the suspension. Look for any elongated holes where…

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Answer 9

Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are…

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Answer 10

If your current springs have 5 leaves then going to a 7 leaf spring will increase the height of the trailer a little and make the trailer more susceptible to sway. Regarding capacity if you go with springs rated higher than what is required it will…

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Answer 11

From what I could find it looks like your 122R (red) and 122Y (amber) lights measure 3.75" x 1.70" x .81". We don't have any replacement lense directly for the GLO-BRITE lights but we do have some similar lights that you could use…

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Answer 12

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Torque Specs for Nuts that Come with 1-1/2" Square Trailer U-Bolts # SP01-120

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