Overview

The full-flow PTFE fitting is a hose end designed specifically for PTFE and PTFE-lined braided hose. A machined aluminum body carries a female swivel nut for the system connection and a socket that grips the hose, while an internal nipple supports the PTFE bore and a silver olive forms the seal when the assembly is closed. Because the internal passage is matched to the hose bore rather than stepped down, flow is not restricted at the connection. Straight, 45° and 90° bodies cover the routing shapes most commonly used on brake, fuel, oil and hydraulic lines.

What Full Flow Means

In many fittings the internal bore narrows where the hose meets the fitting, creating a step that disturbs flow and reduces the effective passage. A full-flow design removes that step: the nipple and the bore behind it are sized so the fluid path stays as close as possible to the hose inner diameter, giving a smooth transition from hose to fitting. The practical benefits are consistent flow, lower pressure drop and more predictable response in systems that depend on it, such as brake circuits, and less turbulence and aeration in fuel and oil systems that run at high flow rates.

Materials and Finish

The body is machined from aluminum and finished in matte black anodizing, a combination chosen for low weight, corrosion resistance and a durable surface that withstands oil, brake fluid, coolant and workshop chemicals. Anodizing also protects the fitting from scuffing during installation and keeps the appearance consistent across a set. The olive and internal components are left in a bright silver finish, which distinguishes them clearly during assembly. The brand is laser-engraved on the collar rather than printed, so the marking survives handling, cleaning and years of service in a hot engine bay.

Construction and Sealing

Sealing takes place in two ways. The nipple is inserted into the hose bore, where the PTFE liner is supported and the internal passage is maintained, and the olive is then compressed between the hose and the body so the hose wall is gripped around its full circumference. The tapered seat at the connection end provides the final seal against the mating adapter or port. Because the load is spread evenly rather than concentrated, the joint tolerates pressure spikes and vibration, and the socket design allows the fitting to be assembled, removed and reused on a new length of hose.

Angles and Alignment

Straight bodies serve direct runs, the 45° elbow handles gradual changes of direction, and the 90° elbow solves the tight corners at calipers, master cylinders, filters and bulkheads. The female swivel nut is a practical advantage in every case: the fitting can be positioned and the hose routed before the nut is finally tightened, so the line is never twisted into place. That protects the PTFE liner and the braid, removes stress from the connection and lets the installer aim the hose exactly where it needs to run.

Choosing the Right Size

PTFE hose and fittings are sized together, so the first step is to confirm the hose size and then match the corresponding fitting. Because the nipple, olive and socket are engineered as a set, size must be confirmed before ordering: a mismatched olive will not seal the hose correctly, and an undersized nipple can damage the liner. Our team can confirm the correct combination from the hose specification, and advise on adapters where a caliper, master cylinder or pump uses a different thread standard from the hose end.

Assembly and Installation

Cut the hose square with a sharp blade, taking care not to fray the braid or distort the PTFE liner. Insert the nipple fully into the bore, position the olive, and close the socket or crimp the assembly using the correct die or tooling for that size. Tighten the swivel nut to the specified torque, run the system up to temperature, and check every joint for leaks before the first hard use; then recheck after the first full heat cycle. Correct assembly is what allows the full-flow passage and the seal to perform as designed.

Applications

These fittings are used on PTFE-lined brake and clutch lines, fuel feed and return circuits, turbo oil feed and return lines, oil cooler systems, hydraulic lines and industrial fluid transfer where a PTFE hose is chosen for chemical resistance or high temperature capability. They suit motorsport, classic restoration, performance street cars and industrial equipment, and they are equally at home where a line has to be remade in the workshop. The same body and olive system covers a range of sizes and angles, so a working stock supports many jobs.

Quality and Inspection

Bodies are machined to tight tolerances so threads engage cleanly, the nipple fits the hose bore as intended, and the internal passage stays concentric and smooth — which is what makes the full-flow claim meaningful rather than a marketing term. Coating coverage is checked, since thin anodizing at the sealing faces or threads can shorten service life. Olives are dimensioned to match their bodies so that assembly produces the intended compression, and finished batches are inspected before packing. Engraved brand markings also make non-genuine fittings easy to identify.

Ordering & Packaging

Fittings can be ordered individually, as matched sets, or as complete assemblies produced and tested to your specification. Standard items ship from stock, while custom sizes, angles and finishes are produced to order, and samples are available for evaluation before a volume order is placed. Packaging can be tailored to distributor or production requirements, including bulk cartons and private labeling, so that goods arrive ready for the shelf or the assembly line.

Specification Table