A solid connection is what keeps your trailer suspension working right. This 5/16" diameter spring-retainer bolt mounts the slipper spring inside the rear hanger so the spring stays where it should. The fit is precise, giving the spring a steady pivot point for consistent movement and a smoother ride.
Durability matters when your trailer racks up miles. At 3-1/4" long and made from Grade 2 steel, this suspension bolt holds up through repeated flex and road vibration. It’s a simple part that carries a big load, designed to keep your suspension hardware tight and dependable.
Installing or replacing this bolt is quick and direct. The 18 threads-per-inch design works with the matching locknut (part 6-11, sold separately) to secure the assembly in place. Once tightened, the slipper spring slides smoothly into the hanger and rests firmly on the bolt for reliable performance.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at this spring keeper bolt for slipper springs. This suspension bolt attaches a leaf spring to a rear hanger. The slipper spring slides into the hanger and rests on this bolt. Now the lock nut that goes with this is sold separately. You can find it here at etrailer.com. This is going to give us a diameter measurement of five sixteenths of an inch.
It's going to feature 18 threads per inch. The length measurement is taken from the bottom of the bolt head to the end of the threaded portion. You can see that that's going to measure right around 3 and one quarter inch long. This is a grade 2 bolt. That's going to do it for today's look at the spring keeper bolt for slipper springs..
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