Stainless Steel ORFS Hydraulic Fittings & Adapters Manufacturer
Hydraxio manufactures and supplies stainless steel ORFS hydraulic adapters and fittings that are fully interchangeable with Parker, SSP, Brennan, and other major brands.
O-Ring Face Seal (ORFS) fittings are designed in accordance with SAE J1453 and ISO 8434-3 standards. They feature a flat sealing surface with an O-ring groove, creating a secure, leak-free metal-to-metal connection in high-pressure hydraulic systems.
Compared to traditional threaded connections, ORFS fittings provide superior sealing performance, especially in applications involving vibration, pressure spikes, and harsh environments. The integrated O-ring ensures consistent sealing and minimizes the risk of leakage.
Hydraxio’s stainless steel ORFS fittings are manufactured from high-quality SS 304 and SS 316/316L materials, offering excellent corrosion resistance and long-term reliability in demanding conditions such as marine, chemical, and industrial environments.
Features:
• Size: 1/8″ to 2″
• Thread: ORFS/ORFS, ORFS/JIC, ORFS/NPT, ORFS/ORB
• Material: SS 304 / SS 316 / 316L / 316Ti
• O-Ring Material: NBR (Buna-N) / FKM (Viton)
• Type: Straight, 45° & 90° Elbow, Tee, Cross, Reducer, Plug, Cap
• Standard: SAE J1453 / ISO 8434-3
• Fully interchangeable with Parker, SSP, Brennan, TITAN, and Tompkins
• Precision CNC machining ensures tight tolerance and consistent quality
• Leak-free performance with ORFS O-ring face seal design
• Excellent corrosion resistance for harsh environments
• 100% dimensional inspection and strict quality control
• OEM customization and technical support available
Types of Stainless Steel ORFS Hydraulic Adapters & Fittings
Stainless steel ORFS hydraulic adapters utilize an O-ring face seal design to deliver leak-free, high-pressure performance in hydraulic systems. These fittings offer excellent resistance to vibration, pressure spikes, and harsh environments.
Our ORFS product range includes tube nuts, sleeves, braze connectors, and various adapters, all manufactured to SAE J1453 and ISO 8434-3 standards for reliable sealing and full compatibility with major brands.
ORFS Tube Nut
(SS-FF0318 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed to secure ORFS tube connections with reliable, leak-free sealing.
ORFS Tube Sleeve
(SS-FF0319 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed to support tube connections and ensure proper sealing in ORFS systems.
ORFS Braze Connector
(SS-FF0403 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed for permanent tube connections in ORFS systems with high strength and leak-free sealing.
NPTF Male × ORFS Adapter
(SS-FF2404 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed to connect NPTF threaded components to ORFS ports with reliable, leak-free sealing.
Male ORFS Adjustable 90 Degree Elbow
(SS-FF6801 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed for adjustable ORFS 90° connections, ensuring precise alignment and leak-free sealing in hydraulic systems.
Male ORFS Union 90 Degree Elbow
(SS-FF2500 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed to connect two ORFS ports at a 90° angle with secure, leak-free sealing.
Male ORFS Union Adapter
(SS-FF2403 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed for standard ORFS connections with reliable, leak-free sealing performance.
ORB Male x ORFS Male Adapter
(SS-FF6400 Series)
Available in sizes 1/4″–2″.
Material: SS 304 / SS 316 / 316L
Designed to connect ORB ports to ORFS fittings with secure, leak-free sealing.
ORFS Thread Size Chart & Dimensions (SAE J1453 / ISO 8434-3)
ORFS (O-Ring Face Seal) fittings utilize a flat face sealing design with an O-ring to achieve leak-free performance in hydraulic systems. This thread size chart provides standard dimensions according to SAE J1453 and ISO 8434-3, including thread sizes, tube outside diameters, and key measurements for accurate selection and installation.
Understanding these specifications helps ensure proper system compatibility, reliable sealing, and long-term performance in high-pressure applications.
| Inch size | Dash size | Thread Size | Male Thread O.D. (in) | Female thread O.D (in) |
|---|---|---|---|---|
| 1/4 | -4 | 9/16 – 18 | 9/16 | 17/32 |
| 3/8 | -6 | 11/16 – 16 | 11/16 | 5/8 |
| 1/2 | -8 | 13/16 – 16 | 13/16 | 3/4 |
| 5/8 | -10 | 1 – 14 | 1 | 15/16 |
| 3/4 | -12 | 1 3/16 – 12 | 1 3/16 | 1 1/8 |
| 1 | -16 | 1 7/16 – 12 | 1 7/16 | 1 3/4 |
| 1 1/4 | -20 | 1 11/16 – 12 | 1 11/16 | 1 5/8 |
| 1 1/2 | -24 | 2 – 12 | 2 | 1 15/16 |
Note: Dimensions may vary slightly depending on material and manufacturing tolerance. Always verify specifications for critical applications.
ORFS Hydraulic Fittings Pressure Rating Chart (SAE J1453 / ISO 8434-3)
ORFS (O-Ring Face Seal) fittings utilize a flat face O-ring sealing design to ensure leak-free performance in demanding hydraulic applications. The pressure ratings listed below are based on SAE J1453 and ISO 8434-3 standards and include data for tube ends, unions, bulkheads, and straight thread stud ends.
Understanding these pressure limits is essential for proper selection, system safety, and long-term reliability in high-pressure hydraulic systems.
| SAE Dash Size | Inch Tube O.D | Thread Size of SAE J453 ORFS Tube Ends | Thread Size of SAE J1926/2/ ISO 11926-2 O-Ring Port | Working Pressure of ORFS Tube Ends, Unions and Bulkheads(Mpa) | Working Pressure of Heavy Duty Stud Ends Non-Adjustable Studs Per SAE J1453, J1926/2/ISO 11926-2(Mpa) | Working Pressure of Heavy Duty Stud Ends Adjustable Studs Per SAE J1453, J1926/2/ISO 11926-2(Mpa) |
|---|---|---|---|---|---|---|
| -4 | 1/4" | 9/16-18 UNF | 7/16-20 UNF | 41.30 | 63.00 | 40.00 |
| -5 | 5/16 | 5/8-18 UNF | 1/2-20 UNF | 41.30 | 63.00 | 40.00 |
| -6 | 3/8" | 1 1/16-16 UNF | 9/16-18 UNF | 41.30 | 63.00 | 40.00 |
| -8 | 1/2" | 1 3/16-16 UNF | 3/4-16 UNF | 41.30 | 63.00 | 40.00 |
| -10 | 5/8" | 1-14 UNF | 7/8-14 UNF | 41.30 | 63.00 | 40.00 |
| -12 | 3/4" | 1-3/16-12 UN | 1 1/16-12 UN | 41.30 | 63.00 | 40.00 |
| -14 | 7/8" | 1-5/16-12 UN | 1 3/16-12 UN | 41.30 | 63.00 | 40.00 |
| -16 | 1" | 1-7/16-12 UN | 1 5/16-12 UN | 41.30 | 63.00 | 40.00 |
| -20 | 1 1/4" | 1-11/16-12 UN | 1 5/8-12 UN | 27.50 | 25.00 | 25.00 |
| -24 | 1 1/2" | 2-12 UN | 1 7/8-12 UN | 27.50 | 25.00 | 20.00 |
Note: Pressure ratings may vary depending on material, temperature, and installation conditions. Always verify specifications for critical applications.
Stainless Steel ORFS Adapter Cross Reference to Parker, SSP & Other Brands
Hydraxio stainless steel ORFS adapters are designed to be fully interchangeable with leading brands including Parker, SSP, Brennan, TITAN, and Tompkins.
This cross reference chart provides equivalent series comparisons, enabling fast product matching, easier sourcing, and reliable replacement in hydraulic systems.
| Hydraxio | SAE | Parker | SSP | TITAN/BI/Tompkins |
|---|---|---|---|---|
| SS-FF0318 Series | 520110 | BL-SS Series | P-N Series | SS-FS318 Series |
| SS-FF0319 Series | TPL-SS Series | P-BS Series | SS-FS319 Series | |
| SS-FF0403 Series | 520104 | LOHB3-SS Series | S-FBZ Series | SS-FS0403 Series |
| SS-FF2404 Series | FLO-SS Series | P-C Series | SS-FS2404 Series | |
| SS-FF2403 Series | 520101 | HLO-SS Series | S-U Series | SS-FS2403 Series |
| SS-FF6400 Series | 520120 | F5OLO-SS Series | P-GC Series | SS-FS6400 Series |
| SS-FF6801 Series | 520220 | C5OLO-SS Series | P-GE Series | SS-FS6801 Series |
| SS-FF2500 Series | 520201 | ELO-SS Series | P-E Series | SS-FS2500 Series |
| SS-FF0306LN Series | 520118 | WLNL-SS Series | S-BN Series | SS-FS306 Series |
All equivalents are based on industry standards and design compatibility. For critical applications, please verify specifications before use.
Applications of Stainless Steel ORFS Hydraulic Fittings
Stainless steel ORFS (O-Ring Face Seal) fittings are ideal for high-pressure hydraulic applications requiring absolute leak prevention, vibration resistance, and long service life.
The flat-face O-ring sealing mechanism eliminates the risk of leakage commonly associated with tapered thread connections, making ORFS fittings a preferred choice in critical hydraulic systems.
Construction and heavy-duty machinery
Vibration-resistant connections in mobile hydraulic systems.
Oil & gas and petrochemical equipment
High-pressure hydraulic lines exposed to aggressive environments.
Marine and offshore applications
Saltwater-resistant hydraulic systems requiring corrosion protection.
Agricultural and forestry machinery
Outdoor hydraulic applications exposed to moisture and environmental stress.
Industrial automation and manufacturing systems
Long-term durability in factory hydraulic operations.
Chemical Processing Industry
Stainless steel performance in corrosive fluid systems.
Frequently Asked Questions
ORFS (O-Ring Face Seal) fittings use a flat-face sealing design with an O-ring positioned in the face of the fitting. When connected, the O-ring is compressed between two flat surfaces, creating a reliable, leak-free seal even under high pressure and vibration.
The key difference lies in the sealing method:
- ORFS: Flat-face seal with O-ring → superior leak prevention
- ORB: O-ring seal at the thread base → relies on proper torque
ORFS fittings are generally preferred for high-pressure, vibration-prone applications where zero leakage is critical.
ORFS fittings typically support working pressures up to 40–63 MPa, depending on size, material, and configuration.
Smaller sizes usually withstand higher pressures, while larger sizes have lower pressure ratings.
ORFS fittings are commonly manufactured from:
- Stainless Steel: SS 304, SS 316, 316L, 316Ti
- O-Ring Materials: NBR (Buna-N), FKM (Viton)
Stainless steel ORFS fittings offer excellent corrosion resistance, making them ideal for harsh environments such as marine, chemical, and offshore applications.
Yes. High-quality ORFS fittings manufactured to SAE J1453 and ISO 8434-3 standards are fully interchangeable with major brands such as:
- Parker
- SSP
- Brennan
- TITAN
- Tompkins
This ensures easy replacement and compatibility in existing hydraulic systems.
When selecting ORFS fittings, consider:
- Thread size and type
- Working pressure requirements
- Connection configuration (straight, elbow, tee, etc.)
- O-ring material compatibility
- Application environment
Proper selection ensures leak-free performance and long service life.
Why Partner with Hydraxio for Stainless Steel Hydraulic Fittings?
✔ 20+ Years Stainless Steel Specialization
✔ 50+ CNC Precision Machines
✔ ISO-Certified Production & Inspection
✔ Global Bulk Supply to 50+ Countries
✔ OEM & Brand-Compatible Solutions
