Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch
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Product Highlights
- Engineered with a double ferrule compression structure to ensure secure, leak-free sealing in instrumentation and process systems.
- Manufactured from SS316 / SS316L stainless steel, providing excellent corrosion resistance for harsh industrial environments.
- Suitable for 1/4", 1/2", 3/4" and 1'' OD tubing, compatible with standard instrumentation tubing systems worldwide.
- Designed for reliable operation in high pressure gas and fluid applications, ensuring safe and stable system performance.
- Compression design allows easy assembly, disassembly, and reuse without welding, reducing maintenance cost and downtime.
- Widely used with: Needle valves, Ball valves ,Manifold valves, Pressure regulators, Gas distribution panels, Enabling full instrumentation and process system integration.
- Strict Quality & Pressure Testing,Each fitting undergoes: Pressure testing, Leak testing, Dimensional inspection Ensuring consistent industrial-grade performance.
Product Attributes
- Customization
- Available
- After-sales Service
- Standard
- Warranty
- 3 Year
- Model NO.
- Ferrule sets
- Technique
- Forged
- Nominal Diameter
- 1/4''
- Type
- Straight Union
- Material
- Stainless Steel
- Connection
- Compression
- Product Name
- Double Ferrule Compression Tube Fittings
- Certificate
- ISO9001
- Product Type
- Instrumentation Tube Fittings
- Size
- 1/4-2 Inch
- Fitting Style
- Union / Compression Set
- Application
- Instrumentation / Hydraulic / Gas System
- Working Pressure
- up to 6000 Psi
- Fitting Standard
- Instrumentation Tube Fitting Standard
- Media
- Gas / Liquid / Chemical Fluid
- Packaging
- Plastic Bag + Carton
- OEM Service
- Available
- Feature
- Leak-Free Connection
- Surface Finish
- Precision Machined
- Temperature Range
- -65°F to 800°F
- Transport Package
- Box Packing
- Specification
- 1/4''-2''
- Trademark
- NAI-LOK
- Origin
- China
- HS Code
- 7307290000
- Production Capacity
- 10000/Month
- Package Size
- 30.00cm * 20.00cm * 15.00cm
- Package Gross Weight
- 1.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch
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Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch -
Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch -
Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch -
Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch -
Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch -
Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch -
Stainless Steel SS316 Double Ferrule Compression Tube Fittings Union for Instrumentation Tubing 1/4 to 3/4 Inch
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Product Description
NAI-LOK SS316 Double Ferrule Tube Fitting 1/4" OD Stainless Steel Compression Straight Union
NAI-LOK SS316 Twin Ferrule Compression Tube Fitting - 1/4" OD Straight Union Connector
NAI-LOK stainless steel tube fittings are precision-engineered to provide secure, leak-free connections in demanding instrumentation and process applications. This 1/4 inch OD straight union connector features a twin ferrule compression design, ensuring superior performance in high-pressure and corrosive environments.
Manufactured from SS316 stainless steel, it offers excellent chemical resistance, making it ideal for use in oil & gas, chemical processing, laboratory systems, and hydraulic control panels. The double ferrule system separates sealing and tube gripping functions, which minimizes the risk of leaks under pressure or vibration.
Each fitting is machined to exact tolerances and undergoes rigorous testing to meet international standards, ensuring reliable, repeatable performance and easy installation without welding or soldering.
A fitting or adapter is used in semi-conductor industry, aero-space industry, solar power battery, petroleum and petrochemical industry,
power energy, bio-pharmaceuticals industry and vacuum system, etc. we will keep moving and making unceasing progress in the high-tech
flow control field and serve the customers sincerely.
Features
-
Material: SS316 / AISI 316 Stainless Steel
-
Type: Straight Union Connector
-
Connection: 1/4" OD Tube to 1/4" OD Tube
-
Design: Twin/Double Ferrule Compression
-
Max Working Pressure: Up to 6000 psi (based on tubing)
-
Corrosion Resistance: Excellent in chemical and offshore environments
-
Temperature Range: -65°F to 800°F (-53°C to 426°C)
Applications
- Instrumentation systems
- Hydraulic systems
- Gas distribution systems
- Petrochemical industry
- Oil & gas industry
- Laboratory systems
- Semiconductor equipment
- Chemical processing plants
- Fluid control systems
- High purity gas applications
| Item | Specification |
|---|---|
| Product Name | SS316 Double Ferrule Set (Back and Front) |
| Brand Name | NAI-LOK |
| Material | Stainless Steel 316 |
| Tube Size Range | 6mm, 8mm, 10mm, 12mm, 16mm, 18mm, 20mm, 25mm |
| Type | Twin Ferrule - Back Ferrule + Front Ferrule |
| Connection Type | Metric Compression Fitting |
| Pressure Rating | Up to 6000 psi (depends on tube OD and wall thickness) |
| Operating Temperature | -40°C to 400°C |
| Surface Finish | Polished, Deburred |
| Application | Gas, Oil, Chemical, CNG, Instrumentation Tubing System |
| Certification | ISO 9001, PED, RoHS |
| Packaging | Plastic Bags + Nai-Lok Labeling + Carton |
| MOQ | 100 sets |
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASI264759". Items marked "
" are certified.
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Company Profile
Established in 2000, NAI-LOK has made a name of itself in the list of top suppliers of in China. We focus on the production, research and development, sales of instrumentation valves and alloy valves. We have more than 20 years of precision valve manufacturing and 10 years of export experience.
Our strict control and management of the entire production process enables us to provide products that meet our customers' requirements for product safety, functionality and design at competitive prices, while ensuring the shortest lead times in the market.
We have the capability to manufacture and supply 4 different product categories, including:
1. General Instrumentation Valves and Fittings
2. High Purity & Ultra High Purity Products- NAI-LOK UHP PRODUCTS, Regulator, Bellows Valve, 3 PC high purity ball valve, Diaphragm Valve, Weld Fitting, Face seal Fitting, Gas Stick.
3. Hose & Tubing
4. Special Alloy Valves, fitting and tubings. Including material S31254 (6 Moly), Alloy 400, HC-276, C22, B3, Alloy 625, Duplex steel 2205 /2507 etc.
We hope there will be opportunities for cooperation.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- 397 Damuqiao Road, Shaxi Town, Taicang City, Suzhou, Jiangsu, China
-
Terms of Payment
- LC, T/T
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
- Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: one month -
Nearest Port
- Shanghai Port
-
Minimum Order Quantity
- 1 Piece
Our Production Capability & Technical Expertise
- Main Products
- Gas Delivery System, Ball Valve, Pressure Regulator, Alloy Valve, 2/3/5 Valve Manifold, Instrumentation Ball Valves, Sample Cylinder, Pipe & Tube Fittings, Needle Valve, Hose & Tubing
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
-
Repeat Buyers Choice
- 50%~80%
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015, ISO14001
FAQ
- What materials are available for SS316 tube fittings?
- Besides SS316 / SS316L stainless steel, Nai-Lok also offers a wide range of corrosion-resistant alloys, including: SS304 / SS304L SS316 / SS316L 904L (UNS N08904) Duplex 2205 (UNS S32205) Super Duplex 2507 (UNS S32750) Monel 400 (UNS N04400) Alloy 625 (UNS N06625) Alloy 825 (UNS N08825) Hastelloy C276 (UNS N10276) These materials are suitable for high corrosion, high pressure, and extreme chemical environments.
- What products does Nai-Lok supply besides tube fittings?
- Nai-Lok is a full-system manufacturer for instrumentation and high purity fluid systems, including: Instrumentation Tube Fittings Needle Valves Ball Valves Check Valves Relief / Safety Valves Manifold Valves (2-way / 3-way / 5-way) Pressure Regulators Seamless Stainless Steel Tubing (BA / EP) Gas Sampling Cylinders Hose & Flexible Metal Assemblies This allows us to provide complete piping and instrumentation solutions.
- What industries use double ferrule compression fittings?
- These fittings are widely used in: Oil & Gas upstream and downstream systems Petrochemical and chemical processing plants Semiconductor and high purity gas systems Hydrogen energy and clean energy projects Pharmaceutical and biotechnology industries Laboratory and analytical instrumentation Power generation and industrial automation systems
- Can these fittings handle high pressure applications?
- Yes. Double ferrule tube fittings are designed for high pressure and vibration resistance, commonly used in instrumentation and process control systems where safety and leak-free performance are critical.
- What is the advantage of double ferrule design?
- The double ferrule compression structure provides: Strong tube grip Excellent vibration resistance Reliable sealing performance Reduced risk of leakage under thermal cycling This makes it ideal for critical instrumentation and gas systems.
- Are these tube fittings suitable for corrosive environments?
- Yes. Depending on material selection, especially Hastelloy, Monel, Duplex, and SS316L, the fittings can perform in highly corrosive environments such as: Chloride-rich seawater systems Acid and chemical processing lines Offshore oil & gas environments High purity gas systems
- Can Nai-Lok provide OEM or custom solutions?
- Yes. We provide full OEM & customization services, including: Custom materials and alloys Special thread standards (NPT / BSP / metric) Logo engraving and branding Custom packaging for distributors Engineering project-based solutions
- What tubing systems are compatible with these fittings?
- These fittings are compatible with: Seamless stainless steel tubing Bright Annealed (BA) tubing Electropolished (EP) tubing Instrumentation-grade tubing systems High purity gas tubing systems
- Why choose Nai-Lok tube fittings over standard suppliers?
- Nai-Lok offers: Full in-house manufacturing capability Wide range of stainless steel and alloy materials High precision machining for leak-free performance Complete instrumentation system product line Strong OEM and project support capability Stable quality for global industrial projects
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