Torque Recommendation for Tightening Curt Hitch Ball to Ball Mount

Question

Question:

How many lbs should tighten/torque this hitchball to meet the 12k lbs rating?

asked by: Rich A

0

Expert Reply:

Curt recommends the use of 250 ft/lbs of torque when tightening the nuts of their hitch balls with a 1 inch diameter shank like the part # 40038 that you referenced.

The general rule is for a 3/4" shank tighten to 150 ft/lbs For a 1" shank tighten to 250 ft/lbs, and for a 1-1/4 inch shank 450 ft/lbs.

expert reply by: Jameson C

0

Answer 1

Curt hitch ball #40038 has a 1 inch diameter shank. For Curt balls with 3/4 or 1 inch diameter shanks you would use wrench #C20001. The nut on that ball should use the 1-1/2 inch end of the wrench. You could also use a large crescent wrench if you…

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Answer 2

We don't have a combo of the Curt Hitch Ball #C40008 and Curt Ball Mount #C45340. The ball mount is extremely heavy-duty, rated up to 17,000 pounds. I think it's safe to assume you don't have a torque wrench rated up to 450 foot pounds…

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Answer 3

The only trailer hitch ball we offer with a 1-3/8" diameter shank is the Hitch Ball part #BWHB94007 which has a 2-5/16" ball diameter and 30,000 lb weight capacity.

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Answer 4

If you have a bench vise you can put a cloth around the ball and use the vise to hold it so you can torque the nut to spec on ball #C40008. Like you said this ball doesn't have wrench flats so there isn't really a better way than using a…

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Answer 5

Curt recommends the use of 250 ft/lbs of torque when tightening the nuts of their hitch balls with a 1 inch diameter shank like the part #C40034 that you referenced. The general rule is for a 3/4" shank tighten to 150 ft/lbs For a 1" shank…

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Answer 6

Right now it appears that the only ball we carry for a 1-3/8" shank is the 2-5/16" Hitch Ball w/ 1" Rise #BWHB94007. This ball is made in the USA, has a 30,000-lbs capacity, and measures 1-3/8" diameter x 2-3/4" wide.…

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Answer 7

The Trimax Dual Purpose Coupler Lock and U-Lock #TMX77FR uses unique keys for the locks. If you were to buy two of these I would expect the keys to be different. If you're looking for a similar lock with a keyed alike option I recommend the…

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Answer 8

Typically people use a large crescent wrench to hold the wrench flats on the ball of the #C45036 but if you wanted a dedicated wrench you'd want a wrench in the size of 1-1/2 inch. You'd want to tighten the nut of the hitch ball to 250 ft…

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Answer 9

The wrench size needed to install the Curt hitch ball part #C40008 that you referenced would be 1-13/16 inches. The torque required for tightening the nut is 450 ft lbs...

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Answer 10

It never hurts to ask and be sure! You are correct that the Curt Class III Ball Mount with 2 Inch Ball #C45036 does come with the hitch ball already installed. The ball comes torqued on the ball mount to the factory specifications, so it is a step…

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Answer 11

I spoke with my contact at CURT and he told me what gives the CURT Hitch Ball, #40038, more strength is the way it is threaded and that it is heat treated beyond what #A-90 is so that gives the 40038 the higher rating. He added that even though 40038…

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Answer 12

I spoke with my contact at B&W about ball #BWHB94008. She determined that you will need to use a 2 inch socket or wrench for the nut on this ball.

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Torque Recommendation for Tightening Curt Hitch Ball to Ball Mount

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