What Size and Style Thread Does the Stillwill Tradesman use for it's Hydraulic Ports?
Updated 10/30/2025 | Published 10/23/2025
Question:
What size and style thread does this jack use for its hydraulic ports?
asked by: Evan
0
Expert Reply:
Great question! This jack uses a #6 hydraulic port, which is the same thing as a 3/8-inch O-Ring Boss (ORB) fitting. That means the port has 9/16-18 UNF threads so the outside diameter is 9/16 of an inch, with 18 threads per inch. It’s a really common size used in hydraulic and automotive systems, making it easy to find compatible hoses and fittings. Let me know if you need hoses for your setup, I am happy to help.
expert reply by:
Heather A
0
Product Page this Question was Asked From
Tradesman Hydraulic A-Frame Trailer Jack - 7K
- Trailer Jack
- Dump Trailer
- Enclosed Trailer
- Utility Trailer
- A-Frame Jacks
- 6001 - 7000 lbs
- Hydraulic Jack
- 24 Inch Lift
- Bolt-On
- With Rectangle Foot
- Stillwell
more information >
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Evan
10/28/2025
Thanks Heather, What is the max rated PSI for this Jack. I know the system is designed for use with 3,000 PSI Hydraulic units, but would it work with anything more powerful?