Description
When you’re dealing with hydraulic connections on your tractor or implement, you need fittings that’ll keep pressure where it belongs—inside the system, not leaking all over your equipment. This AgSmart tube nut with 9/16-18 threads gives you that solid, reliable connection for 1/4 OFS (Outside Flare Seal) hydraulic lines, whether you’re replacing a worn nut or building new connections.
Key Features
- Heavy steel construction stands up to the pressure and vibration your hydraulics dish out daily
- Precision 9/16-18 threads ensure proper fit and seal with OFS hydraulic fittings
- Quality AgSmart manufacturing means this nut won’t strip or fail when you need it most
- Direct replacement for original equipment—no modifications or guesswork needed
Built for Real Farm Work
This tube nut works with hydraulic systems on tractors, loaders, cultivators, planters, and just about any implement that uses 1/4 inch OFS hydraulic connections. From loader bucket cylinders to three-point hitch lift arms, anywhere you’ve got hydraulic pressure running through smaller lines, this nut keeps things sealed up tight.
Made to Last
Steel construction means this nut won’t crack under pressure like some cheaper alternatives might. It’s built to handle the constant pressure cycling and temperature changes that come with hydraulic work, plus the vibration and impacts of field operation.
Installation Notes
Thread this on hand-tight first, then use the proper wrench to snug it down—over-tightening can damage the flare seat. Clean the mating surfaces before assembly, and a light coat of hydraulic fluid on the threads makes installation easier and prevents galling.






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