What Hydraulic Hose Fitting Does the Replacement Jack Leg for etrailer and Ram Hydraulic E93VV Use?
Updated 07/13/2026 | Published 07/09/2026
Question:
am looking at atlas st73fr hyd. jack to replace the old units i have on trailer now cant find anywhere in your adds as to what the threads to hook up hyd. hose are. hoping they are 6 like the ones i have now
asked by: Robert P
Expert Reply:
Hello Robert,
Thanks for writing in.
The hydraulic ports on the Replacement Leg # E93VV use 6 SAE JIC 37-degree flare fittings with 9/16"-18 threads. This is the most common hydraulic fitting used on trailer landing gear and leveling jacks, so if your existing hydraulic system also uses 6 JIC fittings, your current hoses should connect directly without the need for adapters.
While 6 JIC is the industry standard for most hydraulic trailer jack systems, there are some older and specialty systems that use different fittings. If you're replacing an existing jack and you're not sure what fittings your trailer has, I'd be happy to help you verify compatibility.
Did one fail you already, or are they working a little rough and you are trying to prevent a failure?
Tyler S.
7/10/2026
these were purchased to replace the ones that came on my diamond c which were just horrible quailty and craftsmanship, these e trailer ones are amazing and worked perfect, very good quality, I am very satisfied with my purchase and would buy again.
Kate F.
7/13/2026
Product Page this Question was Asked From
Replacement Leg for etrailer/Ram Hydraulic Jack - Square Tube - Weld - 12,000 lbs
- Trailer Jack
- Dump Trailer
- Enclosed Trailer
- 5th Wheel Trailer
- Gooseneck Trailer
- Side-Mount Jacks
- 10001 lbs or More
- Hydraulic Jack
- 24-1/4 Inch Lift
- Weld-On
- With Rectangle Foot
- etrailer
more information >
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on Trailer Jack
Eddie
7/10/2026
Robert on them jacks yes, a #6 hyd fittings is what mine had