CNC Turned Aluminum Threaded Hose Fitting
6061-T6 aluminium hose fittings turned with a threaded or barbed spigot, a sealing face square to the thread within 0.03 mm and the spigot coaxial to the thread within 0.05 mm. Anodized in colour with the threads and barbs masked, so the fitting still assembles by hand after coating.
- Thread and Spigot Coaxial
- Sealing Face Square 0.03 mm
- Barb Formed, Not Cut
- Anodized With Thread Masked
*Tell us the hose type and the working pressure. A barb for a braided hose is not the same as one for a push-on liner, and the wrong barb either leaks or cuts the tube.
Threaded Hose Fitting Overview
A fitting has to do two things at once: seal against a port and grip a hose. The seal depends on the face being square to the thread, and the grip depends on the barb being formed to the hose liner rather than cut into it.
The fitting is turned from bar in one cycle, with the thread cut last so the sealing face can be used as the reference. Barbs are formed with a profile tool that rolls the material rather than a sharp insert that leaves a cutting edge, then the bore is deburred from both ends.
6061-T6 Aluminium Bar
6061-T6 is used for pneumatic and low-pressure hydraulic fittings where weight matters, and it anodizes to a colour that identifies the circuit at a glance on a crowded manifold.
7075-T6 or 316 Stainless
7075 is chosen where the thread sees repeated assembly and the aluminium would wear. Stainless is specified above about 20 bar or in any wet environment, where an anodized thread would corrode into the port.
Pressure and reassembly count decide the material, not the hose size. An aluminium fitting that is taken off twice a year will gall its thread long before a stainless one does.
Threaded Hose Fitting Specifications
Turning data for hose fittings, with the thread, seal face and barb values that decide whether the joint seals and the hose stays on.
| Specification | Machining Data | Specification | Machining Data |
|---|---|---|---|
| Product | Threaded Hose Fitting / Adapter | Machining Process | CNC Turning, Threading, Forming, Deburring |
| Material | 6061-T6 Aluminium Bar | Thread Size | M8 – M30, BSP, NPT, UNF |
| Hose Spigot | 6 – 25 mm Barb or Thread | Coaxiality | Thread to Spigot 0.05 mm |
| Sealing Face | Square to Thread 0.03 mm | Hex Flats | 14 – 36 mm Across Flats |
| Bore | Ø 4 – 20 mm Through | Surface Finish | Ra 1.6 µm Seal Face, Ra 3.2 µm Body |
| Anodizing | Type II 15 – 25 µm, Threads and Barbs Masked | Pressure Rating | Up to 20 bar Pneumatic, 10 bar Hydraulic Return |
| Customization | Swivel Nut, Elbow, Bulkhead, O-Ring Groove | Lead Time | 4 – 6 Days Sample, 10 – 13 Days Batch |
| Inspection | Thread Plug Gauge, Seal Face Squareness, Bore Gauge, Leak Test | Packing | Thread Caps, Bagged, Carton |
Key Features of Our Hose Fittings
Seal face square, barb formed, threads masked.
Seal Face Square to the Thread
The face is turned from the same axis as the thread and held to 0.03 mm, so a bonded washer or an O-ring seals on the first tightening instead of needing a second nip.
Barbs Formed, Not Cut
The barb profile is rolled with a form tool, which leaves a radius on the crest instead of a knife edge, so the hose liner is gripped without being cut.
Spigot Coaxial to the Thread
Both features are cut in one cycle, holding coaxiality to 0.05 mm, so the hose does not sit at an angle and load the fitting sideways.
Threads and Barbs Masked
Plugs and caps protect the functional surfaces during anodizing, and every thread is gauged after coating before the fitting is packed.
Fitting that has to seal and hold the hose?
Surface Finishes for Hose Fittings
Colour identifies the circuit; the thread and the barb have to stay functional underneath it.
| Finish | Main Purpose | Finish | Main Purpose |
|---|---|---|---|
| Type II Anodizing | Colour coding by circuit and corrosion protection | Masked Threads and Barbs | Keeps threads at gauge and barbs at grip size |
| Hard Anodizing | Wear resistance where hoses are pushed on and off | Bead Blasting | Matte body before dye |
| Laser Marking | Thread size and circuit code on the hex | PTFE Tape Pre-Applied | Sealing without a separate tape at assembly |
*Anodizing adds 7 to 12 µm per surface, which is enough to stop a thread starting by hand. Threads are masked and gauged, and barbs are capped so the grip diameter is unchanged.
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Turning Process for Hose Fittings
The spigot is formed rather than cut, so the barb grips the hose liner without a sharp edge that would slice it under pressure.
01. Hose and Port Review
Confirm the hose type, the barb style, the port thread and the working pressure, and check the bore against the flow the circuit needs.
02. Turn the Body
Face the bar, turn the hex and the body, and turn the sealing face first so it can be used as the reference for the thread.
03. Thread and Form the Spigot
Cut the thread to a pre-plate size and form the barb with a profile tool, keeping both on the same axis so the hose runs straight.
04. Bore and Deburr
Drill and bore through, then deburr both ends and the barb roots, since a burr inside the bore restricts flow and a burr on a barb cuts the liner.
05. Mask, Anodize and Gauge
Cap the barbs, plug the threads, anodize to colour, then gauge every thread and check the seal face before fitting protective caps.
Send the hose specification and the port thread, and we will quote the fitting with the barb matched to the hose you run.
Threaded Hose Fitting FAQs
A double-barb profile with a longer lead-in, because the braid needs to be pushed past two crests before the ferrule compresses. A single barb is for push-on liner hose at low pressure.
About 20 bar pneumatic and 10 bar on a hydraulic return line. Above that, stainless or steel is the correct material regardless of weight.
It would, by about 20 µm on the diameter, so the thread is masked and cut to a pre-plate size. Every fitting is gauged after coating.
Yes, a face or radial O-ring groove can be turned in the same cycle, with the groove depth and width to the O-ring drawing.
0.03 mm to the thread axis, checked with a dial indicator on a threaded mandrel. That is what allows a bonded washer to seal at the first torque.
Yes, a sample from each batch is assembled to a test port and held at 1.5 times the rated pressure. Every fitting is gauged, but the leak test is by sample unless you ask for 100 %.
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