Swagelok® Compatible Twin Ferrule Tube Fittings Manufacturer
High-precision stainless steel double ferrule compression fittings interchangeable with Swagelok® and other leading brands.
Hydraxio specializes in manufacturing stainless steel twin ferrule tube fittings for distributors, OEM equipment manufacturers, and global industrial applications.
Available in AISI 304 / 316L with strict CNC machining and 100% pressure testing.
Why Choose Our Twin Ferrule Instrumentation Tube Fittings
Hydraxio specializes in precision-manufactured stainless steel twin ferrule instrumentation tube fittings designed for leak-free sealing and reliable tube grip performance.
Our double ferrule design ensures vibration resistance, consistent reassembly capability, and long-term stability in high-pressure industrial systems.
Interchangeable with Swagelok®-type compression fittings, our products offer dimensional compatibility and dependable field performance without compromising quality.
Manufactured from AISI 304 and 316L stainless steel using advanced CNC machining, each fitting undergoes strict dimensional inspection and 100% hydrostatic pressure testing.
OEM production and private labeling are supported for global distributors and equipment manufacturers.
Technical Overview
- Fractional Size: 1/8″ – 2″
- Metric Size: 4mm – 25mm
- Material: AISI 304 / 316L
- Design: Double Ferrule Compression
- Interchangeability: Swagelok® Compatible
- Testing: 100% Hydrostatic & Nitrogen Leak Test
Stainless Steel Twin Ferrule Tube Fittings Product Range
Compression Ferrules
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Compression Tube Nut
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Male NPT Tube Connector
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Tube Fitting Union
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Fitting Union 90 Degree Elbow
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Positionable 90 Degree Male Elbow
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Male NPT Tube Adapter
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Male JIC Tube Adapter
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Male JIC Tube Connector
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Female NPT Tube Connector
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Tube Fitting Plug
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
NPT Female Tube Adapter
Available in 1/8″-2″/4–25mm, 304/316L stainless steel.
Quality Control & Manufacturing Capability
All Hydraxio stainless steel double ferrule tube fittings are precision-manufactured using advanced CNC machining equipment with strict dimensional tolerance control.
Each production batch undergoes hydrostatic pressure testing and detailed visual inspection to ensure leak-free performance and reliable connection under high-pressure applications.
Our double ferrule tube fittings are compatible with Swagelok , ensuring full interchangeability and consistent quality for global hydraulic systems.
Quality Control Highlights:
✔ 100% Critical Dimension Inspection
✔ Hydrostatic & Nitrogen Pressure Testing
✔ Raw Material Traceability System
✔ Salt Spray Corrosion Test (upon request)
✔ Surface Passivation Treatment (upon request)
Certifications & Testing Standards
ISO 9001 Quality Control
Material Certificates (EN 10204 3.1)
RoHS / REACH
Applications of Stainless Steel Double Ferrule Tube Fittings
Our stainless steel double ferrule tube fittings are widely used in high-pressure hydraulic systems requiring corrosion resistance and long service life.
Designed for demanding industrial environments, they provide reliable, leak-free connections in the following industries:
Oil & Gas Equipment
Used in high-pressure and corrosive hydraulic systems for upstream and downstream oil & gas operations.
Offshore platforms hydraulic systems
Drilling rigs and control units
Pipeline pressure control systems
Stainless steel twin ferrule instrument fittings ensure leak-free performance under high pressure and harsh marine environments.
Marine & Offshore Systems
Designed for corrosion-resistant hydraulic connections in marine environments.
Shipboard hydraulic pipelines
Deck crane systems
Steering gear systems
Offshore lifting equipment
AISI 316L stainless steel provides superior resistance to saltwater corrosion.
Chemical Processing
Used in corrosive and high-temperature chemical environments.
Chemical plant hydraulic systems
Corrosive media pipelines
Reactor control units
Dosing and metering systems
AISI 316L stainless steel ensures corrosion resistance and reliable sealing performance.
Construction & Mining Machinery
Reliable hydraulic connections for heavy-duty and high-vibration machinery.
Excavators and loaders
Underground mining drills
Hydraulic rock breakers
Industrial hydraulic presses
Our Twin Ferrule Tube Fittings ensure leak-free and vibration-resistant connections in demanding environments.
Agricultural Machinery
Durable hydraulic connections for mobile equipment operating in outdoor environments.
Tractors and harvesters
Irrigation hydraulic units
Seeding equipment
Spraying systems
Double ferrule tube fittings are ideal for medium-pressure agricultural systems.
Food & Pharmaceutical Equipment
Suitable for clean hydraulic systems requiring stainless steel components.
Food processing machinery
Beverage filling systems
Laboratory hydraulic units
Sterile production lines
316L stainless steel provides clean surface finishing and corrosion resistance.
SS Twin Ferrule Tube Fittings Cross Reference to Swagelok & Other Brands
Hydraxio’s SS instrumentation tube fittings are completely equivalent to Swagelok, Parker, SSP and Superlok. Here are the quick details:
| Hydraxio | Swagelok | SSP DUOLOK | Parker A-LOK | Superlok |
|---|---|---|---|---|
| SS-N0318 Series | SS-402-1(Example 1/4‘’） | ISSD-N Series | 4NU4-SS(Example 1/4‘’） | SN Series |
| SS-N2404 Series | SS-400-1-4(Example 1/4“） | ISSD Series | 4MSC4N-SS(Example 1/4") | SMC-N Series |
| SS-N2403 Series | SS-6 Series | SSD-U Series | 4SC4-SS(Example 1/4") | SU Series |
| SS-N2500 Series | SS-9 Series | ISSD-L Series | 1E-SS Series | SUE Series |
| SS-N6801 Series | SS-ST Series | ISSD-MEST Series | 8M5SEL8-SS(Example 1/2") | SPME-U Series |
| SS-2428 Series | SS-4-TA-1-4(Example 1/4") | ISSD-AM Series | 4AM4N-SS(Example 1/4") | SMA-N Series |
| SS-N2427 Series | SS-4-TA-1-4AN(Example 1/4") | ISSD-ANA Series | SAA-U Series | |
| SS-2402 Series | SS-6-AN Series | ISSD-ANU Series | 4XASC4-SS(Example 1/4") | SAU-U Series |
| SS-2405 Series | SS-400-7-4 Series(Example 1/4") | ISSD4CF4(Example 1/4") | 4FSC4N-SS(Example 1/4") | SFC-N Series |
| SS-N2408 Series | SS-C Series | ISSD-C Series | 4BLEN4-SS(Example 1/4") | SC Series |
| SS-N2430 Series | SS-4-TA-7-4(Example 1/4") | ISSD4AF4(Example 1/4"0 | 4AF4N-SS（Example 1/4"） | SFA-N Series |
Brand names mentioned are for reference purposes only.
Pressure Ratings of Double Ferrule Tube Fittings
Allowable working pressures are calculated using an S value of 20,000 psi (1378 bar) for ASTM A269 tubing at temperatures from −20 to 100°F (−28 to 37°C), in accordance with the ASME B31.3 Process Piping Code and ASME B31.1 Power Piping Code.
Table 1: Fractional Seamless Stainless Steel Tubing
Working pressure shown in PSI.
| Tube OD (in) | WT 0.028 | WT 0.035 | WT 0.049 | WT 0.065 | WT 0.083 | WT 0.095 | WT 0.109 | WT 0.120 | WT 0.134 | WT 0.156 | WT 0.188 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/8 | 8500 | 10900 | |||||||||
| 3/16 | 5400 | 7000 | 10200 | ||||||||
| 1/4 | 4000 | 5100 | 7500 | 10200 | |||||||
| 5/16 | 4000 | 5800 | 8000 | ||||||||
| 3/8 | 3300 | 4800 | 6500 | 8600 | |||||||
| 1/2 | 2600 | 3700 | 5100 | 6700 | |||||||
| 5/8 | 2900 | 4000 | 5200 | 6000 | |||||||
| 3/4 | 2400 | 3300 | 4200 | 4900 | 5800 | 6400 | |||||
| 1 | 2400 | 3100 | 3600 | 4200 | 4700 | 5300 | 6200 | ||||
| 1 1/4 | 2400 | 2800 | 3300 | 3600 | 4100 | 4900 | |||||
| 1 1/2 | 2300 | 2700 | 3000 | 3400 | 4000 | 4900 | |||||
| 2 | 2000 | 2200 | 2500 | 2900 | 3600 |
Table 2: Metric Seamless Stainless Steel Tubing
Working pressure shown in PSI.
| Tube OD (mm) | WT 1.0 | WT 1.5 | WT 2.0 | WT 2.5 | WT 3.0 | WT 3.5 | WT 4.0 | WT 4.5 | WT 5.0 |
|---|---|---|---|---|---|---|---|---|---|
| 6 | 420 | 670 | |||||||
| 8 | 310 | 490 | |||||||
| 10 | 240 | 380 | |||||||
| 12 | 200 | 310 | 430 | ||||||
| 14 | 180 | 280 | 390 | ||||||
| 15 | 170 | 260 | 360 | ||||||
| 16 | 240 | 330 | |||||||
| 18 | 210 | 290 | 370 | ||||||
| 20 | 190 | 260 | 330 | ||||||
| 22 | 170 | 230 | 300 | ||||||
| 25 | 200 | 260 | 320 | ||||||
| 28 | 180 | 230 | 280 | 330 | |||||
| 30 | 170 | 210 | 260 | 310 | |||||
| 32 | 160 | 200 | 240 | 290 | 330 | ||||
| 38 | 170 | 200 | 240 | 280 | 310 | ||||
| 42 | 180 | 210 | 250 | 280 | |||||
| 50 | 150 | 180 | 200 | 230 | 260 |
Hydraxio: Your Reliable Stainless Steel Double Ferrule Tube Fittings manufacturer
With over 20 years of industry leadership, Hydraxio specializes in the manufacture of stainless steel tube and hose fittings. Our reputation is built on a foundation of exceptional team expertise, cutting-edge technology, rigorous quality control, robust production capacity, and unparalleled professional service.
Widely recognized by global hydraulic & industrial wholesalers, distributors, and OEMs across sectors including hydraulic, pneumatic, oil & gas, chemical, marine, and shipbuilding, our products are synonymous with reliability and quality. We also provide OEM service to major worldwide hydraulic fitting manufacturers, helping them reduce production costs and gain more market share.
Hydraxio continues to thrive in the high-quality overseas market, consistently meeting and often exceeding customer expectations. As a dependable and respected supplier of stainless steel hydraulic fittings, we remain committed to innovation, quality, and customer satisfaction.
Frequently Asked Questions
Yes. Our stainless steel twin ferrule tube fittings are dimensionally compatible and fully interchangeable with Swagelok®-type compression fittings. They are designed to ensure reliable sealing performance and field-tested interchangeability.
Swagelok® is a registered trademark of its respective owner. Brand names are used for reference purposes only.
Our twin ferrule tube fittings are available in different pressure ratings depending on size and series. Standard configurations support working pressures up to 630 bar. Detailed pressure ratings are available upon request.
We manufacture twin ferrule fittings in:
AISI 304
AISI 316
AISI 316L
316L stainless steel is recommended for corrosive and marine environments.
Our twin ferrule tube fittings are available in:
Fractional sizes: 1/8" to 2"
Metric sizes: 4mm to 25mm
Custom sizes can be produced for OEM applications.
All fittings are precision-machined using CNC equipment and undergo:
100% dimensional inspection
Hydrostatic pressure testing
Nitrogen leak testing
The double ferrule design provides consistent tube grip and vibration resistance.
Yes. We support OEM production, custom drawings, and private labeling for distributors and equipment manufacturers worldwide. Material traceability and batch inspection reports can be provided upon request.
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
