How to Measure for a Replacement T Strap Hinge on Horse Trailer

Updated 04/17/2026 | Published 04/09/2026

Question:

Hello I’m looking for a t strap hinge for my horse trailer. I have photos i can send. It’s a 1999 sooner. Thank you.

asked by: Erin F

Expert Reply:

Hi Erin, thanks for reaching out. I’m really glad you asked because getting the right T strap hinge on a 1999 Sooner makes a big difference in keeping that door aligned and swinging smoothly without any sag.

The T strap hinge you’re looking at with part # PLR3408 is a solid option, but with older trailers there can be small variations, so the best way to be confident is to compare its specs to what you currently have. What you’ll want to check is the overall strap length and width, the spacing between the mounting holes, and the diameter of the hinge pin or barrel.

Part # PLR3408, has an overall length of 9-5/8 inches. The bracket measures 4-1/2 inches tall by 1-5/8 inches wide with mounting holes spaced 3-1/4 inches center to center, and the holes themselves are 13/32 inches in diameter. The strap side is 8 inches long by 2 inches wide with mounting holes spaced 2-7/16 inches center to center, and it uses a 1/2 inch diameter pin.

If those measurements match what you currently have on your trailer, you should be in great shape for a proper fit and smooth operation. Even small differences in hole spacing or pin size can cause alignment issues, so it’s definitely worth double checking.

If you want a second set of eyes, feel free to send over your photos and I can help compare everything.

Out of curiousity, what kind of horses do you have?

expert reply by: Heather A

Michaela W.

4/15/2026

I have a 2005 Thurobilt and used these to replace the manufacturer’s hinges, they’re great quality and work well.

Heather A.

4/15/2026

@MichaelaW I really appreciate you sharing that. It’s always helpful to hear from someone who’s actually used these on a similar trailer, especially with another horse trailer brand like your Thurobilt. What kind of horses do you have?

Michaela W.

4/15/2026

Quarterhorses. Lazy from not being ridden all winter. Have to lunge them tomorrow, the shoer is coming to do trims and he doesn’t like them to be too spicy lol

Heather A.

4/15/2026

@MichaelaW haha Sounds like most kids, they always seem to have a little extra energy saved up right when you need them to behave the most. Hopefully the lunging session burns off some energy!

Erin F.

4/17/2026

I have quarter horses! Thanks for the reply. This hinge is 8 5/8” total length. 5 3/8” top to bottom. First two bolts are 2 1/2” apart and the other two on the end are 1 3/4”. These are all from center. Thanks!

Heather A.

4/17/2026

@ErinF Awe, thats so fun! Those are beautiful horses. The strap length I gave you isn't completely accurate, the strap itself measures 8" long and 2" wide. I gave you the measurements of the strap with the hinge. The PLR3408 is closest option we have for you. You will most likely need to drill more holes though. We don't carry anything with your mounting hole pattern.