Podavelle AN3 Stainless Steel Tube Nut & Sleeve Fitting for 3/16" Hardline — 2 Sets, 37° Flare

Podavelle 3AN stainless steel nuts and sleeves form a reliable 37° flare -3 AN connection for 3/16" hardline tubing (two nut-and-sleeve sets included).

These fittings are machined from 304 stainless steel and sized for AN3 (3/8-24 UNF) connections to 3/16" outside-diameter hardline. They convert the end of rigid brake, fuel, or hydraulic lines into a standardized -3 AN threaded interface when the tubing is flared to 37 degrees. Each package contains two complete assemblies — two nuts and two sleeves — ready to be paired with appropriately prepared hardline. A flaring tool and correct 37° flares are required for installation; professional installation is recommended where safety and leak-tight performance matter.

How do these nuts and sleeves turn hardline into a -3 AN fitting?

These components are a classic ferrule-and-nut arrangement sized for AN3 threads and 3/16" OD tubing. The sleeve (ferrule) seats against a 37° flare on the tube end, and the nut compresses the sleeve to form the metal-to-metal seal needed for AN connections.

• Fits 3/16" OD hardline — accepts a 37° flared tube end.
• Nut threads match 3/8-24 UNF (-3 AN) male fittings.
• Sleeve (ferrule) designed to compress and seal under torque.
• Two complete sets included for parallel lines or spare use.

What materials and dimensions should I expect?

Both nut and sleeve are manufactured from 304 stainless steel for corrosion resistance and strength in automotive and industrial environments. The nut thread is AN3 (3/8-24 UNF), and the sleeve sits a standard distance to pair with the 37° flare profile on 3/16" tubing.

• Material: 304 stainless steel for durability and corrosion resistance.
• Thread size: AN3 / 3/8-24 UNF compatible with -3 AN fittings.
• Tubing compatibility: 3/16" outside diameter hardline.
• Quantity: two nuts and two sleeves per package (two assemblies).

What tools and prep are required for installation?

Installation requires the tube end to be flared at 37° using an appropriate hardline flaring tool (single or double flaring tools designed for hard tubing). No installation instructions are included, and incorrect flares or improper torque can compromise sealing, so professional installation is recommended if you are not experienced with hardline flaring.

• Required: 37° flaring tool sized for 3/16" hard tubing.
• Optional but recommended: torque wrench or calibrated driver for proper nut seating.
• Warning: improper flares or overtightening can cause leaks or damage.
• Note: fittings sold as nuts and sleeves only; male AN fittings and hoses are separate.

Will these work on my brake or fuel hardline system?

These assemblies are compatible with any rigid tubing that measures 3/16" OD and can be flared to a 37° profile, commonly used when adapting factory hardline to AN-style fittings in fuel, oil, and some hydraulic applications. Confirm material compatibility and system specifications before modifying safety-critical lines.

• Common uses: fuel lines, oil lines, vacuum or low-pressure hydraulic lines adapted to AN fittings.
• Not a complete hose assembly — intended as the nut-and-sleeve portion only.
• Use in safety-critical braking systems should follow manufacturer guidance.
• Professional installation advised for pressurized or safety-related systems.

Who is this for? These Podavelle AN3 nuts and sleeves suit DIY mechanics, shop technicians, and fabricators who need to adapt 3/16" hardline to -3 AN threaded connections. They are ideal as replacement ferrules for custom plumbing projects, retrofits on classic vehicles, or spares for performance builds — provided you have access to a proper 37° hardline flaring tool and follow correct installation procedures.