What makes ORFS fittings superior in high-vibration systems?

The ORFS system uses a soft O-ring seal captured between two flat faces. This elastic seal absorbs vibration and maintains constant contact, making it virtually immune to the loosening and leaks that plague rigid, metal-to-metal connections.

What is the 'zero clearance' advantage of ORFS fittings?

Zero clearance means you can remove a component from a line without bending adjacent tubes. The fitting separates by pulling straight apart, which makes maintenance in tight spaces drastically faster and easier.

Workbench view of forged steel O-Ring Face Seal (ORFS) hydraulic fittings, showing the critical flat sealing face and O-ring groove.

Steel O-Ring Face Seal (ORFS) Fittings - Wholesale & OEM Supply

The Gold Standard for Zero Leaks in High-Vibration Systems.

Stop Gambling. Start Sealing.

A JIC fitting works fine... until it doesn't. In equipment that shakes, rattles, and runs hard all day, a simple metal-to-metal flare seal is just a leak waiting to happen. The O-Ring Face Seal (ORFS) fitting is what smart OEMs spec when a callback for a leak is not an option. Governed by the strict SAE J1453 standard, this isn't just a fitting; it's an engineered system for total hydraulic containment.

The concept is rock-solid: instead of crushing two pieces of metal together and hoping for the best, you're compressing a tough O-ring between two perfectly flat, machined faces. The result is a soft seal with the strength of a forged steel body. For you, the distributor or OEM, this fitting is your ace in the hole. It's how you deliver equipment that doesn't leak, and it's got a bonus: the zero-clearance design means a mechanic can swap a line in the guts of a machine without tearing everything else apart. That's how you sell uptime, not just parts. For applications in corrosive environments like marine or chemical processing, see our specialized 316 Stainless Steel ORFS Fittings.

O-Ring Face Seal (ORFS) Fitting Catalog (Steel)

SAE ORFS Tube Union

Part #: FS2403

Connects two ORFS female swivel fittings or specially prepared tube ends in a straight line. Male ORFS flat face ends.

SAE ORFS Male x NPTF Pipe Male Adapter

Part #: FS2404

Straight adapter connecting a female ORFS swivel fitting to a female NPTF port. Male ORFS x Male NPTF ends.

SAE ORFS Swivel Nut Reducer / Expander

Part #: FS2406

Adapter allowing connection between different ORFS thread sizes. Features female swivel nuts on both ends.

SAE ORFS Plug

Part #: FS2408

Seals an unused female ORFS swivel fitting or port. Male ORFS flat face with O-ring groove.

SAE ORFS Swivel Nut Straight Adapter

Part #: FS7504

Straight connector typically with female ORFS swivel nuts on both ends for joining male ORFS fittings.

SAE ORFS Male 90° Elbow

Part #: FS2500

Changes flow direction by 90°. Connects two female ORFS swivel fittings. Male ORFS ends.

SAE ORFS Male x NPTF Pipe Male 90° Elbow

Part #: FS2501

90° adapter elbow connecting a female ORFS swivel fitting to a female NPTF port. Male ORFS x Male NPTF ends.

SAE ORFS Male x NPTF Pipe Male 45° Elbow

Part #: FS2503

45° adapter elbow connecting a female ORFS swivel fitting to a female NPTF port. Male ORFS x Male NPTF ends.

SAE ORFS Male x NPTF Pipe Male Branch Tee

Part #: FS2601

Tee adapter connecting one female ORFS swivel and two female NPTF ports. Male ORFS branch, Male NPTF run ends.

SAE ORFS Male Tee

Part #: FS2603

Connects three female ORFS swivel fittings in a tee configuration. All ends Male ORFS.

SAE ORFS Male Cross

Part #: FS2650

Connects four female ORFS swivel fittings at 90° angles. All ends Male ORFS.

SAE ORFS Male Bulkhead Union

Part #: FS2700

Connects two female ORFS swivel fittings through a panel or bulkhead. Straight union with locknut. Male ORFS ends.

SAE ORFS Male Bulkhead 90° Elbow

Part #: FS2701

90° elbow fitting designed to pass through a panel or bulkhead, connecting ORFS lines. Male ORFS ends, includes locknut.

SAE ORFS Male Bulkhead 45° Elbow

Part #: FS2702

45° elbow fitting for bulkhead pass-through, connecting ORFS lines. Male ORFS ends, includes locknut.

SAE ORFS Male Bulkhead Branch Tee

Part #: FS2703

Tee fitting where one connection passes through a bulkhead. Typically Male ORFS ends, includes locknut.

SAE ORFS Male Bulkhead Run Tee

Part #: FS2704

Tee fitting where the straight-through ('run') connection passes through a bulkhead. Male ORFS ends, includes locknut.

SAE ORFS Cap

Part #: FS304C

Seals the end of a male ORFS fitting. Female ORFS swivel nut with a flat sealing face.

SAE ORFS Bulkhead Locknut

Part #: FS306

Nut used to secure an ORFS bulkhead fitting (like FS2700 series) to a panel or bulkhead wall.

SAE ORFS Braze Nut

Part #: FS318

Female swivel nut designed to be brazed onto a tube end, used with sleeve FS319.

SAE ORFS Braze Sleeve (FS319 / FS319W)

Part #: FS319 / FS319W

Sleeve component designed to be brazed onto a tube end to create the flat sealing face for ORFS connections.

Tube Sleeve ORFS - Mechanical

Part #: FS319M

Mechanical sleeve, potentially for a flareless ORFS tube connection system (differs from braze type).

SAE ORFS Male x SAE ORB Male Straight Adapter

Part #: FS6400

Straight adapter connecting a female ORFS swivel fitting to an SAE O-Ring Boss port. Male ORFS x Male ORB ends.

ORFS Male x ORB Male Straight Adapter Long

SAE ORFS Male x SAE ORB Male Straight Adapter Long

Part #: FS6400L

Long version of the ORFS Male x ORB Male adapter for extended reach.

SAE ORFS Male x 37° Female JIC Swivel Adapter

Part #: FS6402

Straight adapter connecting a male JIC flare fitting/tube to an ORFS female swivel fitting. Male ORFS x Female JIC Swivel ends.

SAE ORFS Male x 37° Male JIC Adapter

Part #: FS6403

Straight adapter connecting a female ORFS swivel fitting to a female JIC swivel fitting/tube. Male ORFS x Male JIC ends.

ORFS Female Swivel x ORB Male Straight Adapter

SAE ORFS Female Swivel x SAE ORB Male Straight Adapter

Part #: FS6412

Straight adapter connecting a male ORFS fitting to an SAE O-Ring Boss port. Female ORFS Swivel x Male ORB ends.

SAE ORFS Male x ORFS Female Swivel 90° Elbow

Part #: FS6500

90° elbow with one male ORFS end and one female ORFS swivel nut end.

SAE ORFS Male x ORFS Female Swivel 45° Elbow

Part #: FS6502

45° elbow featuring one male ORFS end and one female ORFS swivel nut end.

ORFS Female Swivel x JIC Male Straight Adapter

SAE ORFS Female Swivel x 37° Male JIC Straight Adapter

Part #: FS6504

Straight adapter connecting a male ORFS fitting to a female JIC swivel/tube. Female ORFS Swivel x Male JIC ends.

SAE ORFS Swivel Nut Branch Tee

Part #: FS6600

Tee fitting where the branch connection uses a female ORFS swivel nut. Run ends typically male ORFS.

SAE ORFS Male x SAE ORB Male 90° Elbow

Part #: FS6801

90° adapter elbow connecting a female ORFS swivel fitting to an SAE O-Ring Boss port. Male ORFS x Male ORB ends.

SAE ORFS Male x SAE ORB Male 45° Elbow

Part #: FS6802

45° adapter elbow connecting a female ORFS swivel fitting to an SAE O-Ring Boss port. Male ORFS x Male ORB ends.

SAE ORFS Male x SAE ORB Male Branch Tee

Part #: FS6803

Tee adapter connecting one female ORFS swivel and two ORB ports. Male ORFS branch, Male ORB run ends.

SAE ORFS Male x SAE ORB Male Run Tee

Part #: FS6804

Tee adapter connecting one ORB port and two female ORFS swivel fittings. Male ORB branch, Male ORFS run ends.

SAE ORFS Female Swivel x SAE ORB Male 90° Elbow

Part #: FS6809

90° adapter elbow connecting a male ORFS fitting to an SAE O-Ring Boss port. Female ORFS Swivel x Male ORB ends.

SAE ORFS Swivel Nut Run Tee

Part #: FS6602

Tee fitting where the run connections use female ORFS swivel nuts. Branch typically male ORFS.

Related ORFS Accessories

Buna N O-Ring for SAE ORFS Fittings

Part #: OFS1 Series

Standard Buna-N (Nitrile) O-rings specifically sized for the face groove on male SAE ORFS fittings. Suitable for common hydraulic fluids.

Viton® O-Ring for SAE ORFS Fittings

Part #: OFS2 Series

Viton® (FKM) O-rings sized for ORFS fittings, offering enhanced chemical and temperature resistance compared to Buna-N.

The Shop Floor Truth on ORFS Fittings

In hydraulics, pressure is power, but a leak is a failure. Period. O-Ring Face Seal isn't some newfangled tech; it’s the proven, top-tier solution for keeping fluid where it belongs when the going gets rough. Here's what you need to know, without the marketing fluff.

How it Works: A Gasket in a Fortress

Forget everything you know about crushing metal flares. ORFS works like a high-pressure gasket.

Two Flat Faces: The male and female fittings have perfectly flat, machined faces. When they meet, they form a solid barrier.
The Captive O-Ring: The male fitting has a groove in its face holding an O-ring. As you tighten the swivel nut on the female end, this O-ring gets squeezed between the two flat faces. That's your seal. It’s elastic, forgiving, and incredibly robust.
Straight Threads for Clamping: Just like on ORB fittings, the threads only provide clamping force. They pull the faces together; they don't seal anything. This means the connection is immune to the vibration that can loosen a tapered thread.

Why It’s a Game-Changer for a Technician

Virtually Leak-Proof: When assembled correctly, this is the most leak-resistant hydraulic fitting on the market. The soft seal conforms to any minor imperfections and holds tight under impulse and vibration that would kill a metal-to-metal seal.
Zero Clearance Advantage: This is a big deal. You can remove a hose or a component in a line without having to bend or flex other rigid tubes out of the way. For a mechanic in a tight engine bay, this saves hours of work and frustration.
High-Pressure Workhorse: ORFS fittings are rated for extremely high working pressures, making them the standard on modern heavy equipment and industrial machinery.
Highly Reusable: As long as the flat faces aren't gouged and you use a fresh O-ring, you can take these connections apart and put them back together repeatedly with confidence.

What to Watch Out For (The Real Talk)

Higher Cost: Let's be honest, these cost more than a JIC fitting. The precision machining of the flat face requires more time and better machinery. You're paying for performance and reliability, not just steel.
The O-Ring is Everything: The entire system's integrity hangs on that little O-ring. If it's nicked during installation, forgotten, or the wrong material (like using Buna-N in a high-temp system that needs Viton®), the fitting will leak. Assembly requires care.
Damage to the Face: A deep scratch or a ding on either flat face can create a leak path. These fittings need to be handled and stored properly to protect their sealing surfaces.

Bottom line: ORFS is the premium choice for a reason. You spec it on construction equipment, mining gear, and any machine where vibration is a constant and a leak means serious downtime. It’s a mark of quality engineering.

The Zero-Leak Solution for Your Toughest Jobs.

Give your customers the reliability of O-Ring Face Seal. As a direct manufacturer, we have the capacity for high-volume orders of forged steel ORFS fittings. For wholesale pricing and a supply chain you can actually count on, talk to our team.

Get a Wholesale Quote on ORFS Need it in Stainless Steel?