
3239X04X04 | #4 NPT F to #4 ORB M Hydraulic Adapter
- NPT Female to ORB Male connection
- 52 units in stock for fast shipping
- Precision-engineered reliability









Made in USA
4AN ORB fittings are precision-engineered hydraulic adapters designed for reliable, leak-resistant connections in fluid power systems. Featuring O-Ring Boss (ORB) threads and multiple connection configurations including NPT, JIC, and ORB variants, these fittings enable secure fluid transfer in industrial hydraulic equipment. Available in straight and 90-degree elbow configurations, they support system conversions and space-constrained installations across mobile machinery, construction equipment, and agricultural applications.
Talk to our experts for custom solutions and tailored guidance.
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What size is a #4 fitting?
A #4 fitting has a 7/16"-20 UNF thread size and is designed for 1/4" tubing. This is a standard AN (Army-Navy) size used in hydraulic and fluid power systems.
What is the difference between ORB and NPT threads?
Can I mix JIC and ORB fittings in my hydraulic system?
What is the advantage of 90-degree elbow fittings?
Are these fittings compatible with high-pressure hydraulic systems?
How do I ensure I'm ordering the correct fitting configuration?
What industries commonly use 4AN ORB hydraulic fittings?
Talk to our experts for custom solutions and tailored guidance.

Essential for hydraulic line connections in excavators, loaders, and dozers requiring reliable fluid power systems.

Critical components for tractors, harvesters, and irrigation systems demanding leak-resistant hydraulic connections.

Powers fluid transfer systems in manufacturing equipment, presses, and automated machinery requiring precision connections.

Enables reliable fluid power in log splitters, firewood processors, and portable equipment in demanding field conditions.
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All hydraulic fittings engineered, manufactured, and assembled in Upstate NY with raw materials sourced from North America, ensuring superior quality control and reliability.
Purchase directly from the source and eliminate middleman markups. Our in-house fabrication and streamlined processes deliver unbeatable value without compromising quality.
Get direct support from the engineers and builders who design these fittings. Our team are fellow heavy machinery operators who understand your applications firsthand.
Our hydraulic specialists will help you select the correct fitting configuration and ensure compatibility with your equipment. Expect a response within 24 hours.
For immediate assistance, feel free to give us a direct call at 607-307-4029 You can also send us a quick email at Sales@TimberwolfEquip.com
For immediate assistance, feel free to give us a direct call at 607-307-4029 You can also send us a quick email at Sales@TimberwolfEquip.com