Speedflow Weld-On Alloy ORB Female Port – 4AN to 20AN

Speedflow Weld-On Alloy ORB Female Port

These Speedflow weld-on Alloy ORB female port’s provides a modern sealing solution for custom tanks and manifolds. ORB uses a straight thread and an O-ring to create a face seal — perfect for high-pressure or EFI applications and softer alloy housings where repeated service is expected.

Unlike tapered threads (NPT), ORB does not rely on thread wedging or sealant. The O-ring takes the load, which protects the thread and makes reassembly easier.

What are you looking at here?

• A female ORB bung

• Weld-on

• Accepts a male ORB fitting with an O-ring

Real-world tips

• ORB is the cleanest choice for EFI fuel systems, pumps, regulators, fuel rails, oil blocks and billet assemblies

• No sealant/Teflon = no contamination risk in fuel systems

• Great when a fitting may need to be removed regularly

• Less chance of galling than AN or NPT threads in alloy

• If you need a flare style, use the AN male weld-on type instead

Speedflow Weld-On Alloy ORB Female Port FAQ’s

Q: What’s the advantage of ORB over AN?
A: ORB seals on an O-ring instead of a flare. It’s ideal for soft alloy housings, EFI fuel systems and high serviceability situations because the port can be removed and reinstalled without damaging the seat.

Q: Do I need thread sealant or Teflon tape?
A: No — the O-ring creates the seal. Sealant is not required and should be avoided in fuel systems.

Q: Is ORB the same as NPT?
A: No. NPT is a tapered pipe thread that seals by wedging the thread. ORB is a straight thread with an O-ring. They are not interchangeable.

Q: Where would I typically use an ORB weld-on port?
A: EFI fuel rails, surge tanks, catch cans, oil tanks, filter heads, billet brackets and modern fuel system upgrades — anywhere clean, serviceable sealing is required.

Why Lowe Fab Choose Speedflow

At Lowe Fab, we back Australian-made whenever possible — not just as a slogan, but because it consistently delivers better results on the bench and in the car. Speedflow fittings are designed, engineered and manufactured in Australia, using premium materials and modern in-house tooling that puts reliability ahead of marketing hype. These aren’t rebranded imports — they’re the real deal.

From a fabricator’s point of view, the quality difference is immediate:

• The alloy welds cleaner

• The machining is more accurate

• The sealing faces are consistent

• The threads don’t gall or tear

• The tolerances are motorsport-grade, not “close enough”

When you’re building fuel systems, catch cans, reservoirs, surge tanks or anything mission-critical, cheap fittings create rework. Speedflow eliminates that risk. They fit right, weld right, and seal right — every time.

We don’t just sell them — we use them exclusively on our own builds.

Because when performance, safety and presentation matter, Speedflow is the benchmark.