Flareless Hydraulic Fittings
Flareless fittings contain a connection with a 3-piece design that contains a Nut, Ferrule (Sleeve), and the Body. Flareless fittings are popular in many applications worldwide due to their reliability and pressure holding capabilities. Contact Universal Power Conversion for more information on flareless fittings today.
Reliable Tube Connections Without Flaring or Welding
Flareless hydraulic fittings, also known as compression grip fittings or bite-type hydraulic fittings, are a widely specified connection standard for hydraulic and fluid power systems where tube preparation simplicity, installation reliability, and leak-resistant performance are priorities.Designed to create a secure, pressure-tight connection without requiring tube flaring or welding, flareless fittings offer engineers and system designers a practical, field-friendly alternative to traditional hydraulic connection methods.
Universal Power Conversion supplies a comprehensive range of flareless hydraulic fittings engineered to meet SAE J514 dimensional and performance standards, ensuring broad compatibility across hydraulic system platforms, equipment manufacturers, and global supply chains. Contact us for more information, or request a quote today.
What Are Flareless Hydraulic Fittings?
Flareless hydraulic fittings are tube connection devices that grip and seal directly onto the outer diameter of a hydraulic tube, without requiring the tube end to be flared, brazed, or welded prior to assembly. The connection is achieved mechanically through a ferrule or cutting ring that bites into or compresses against the tube surface as the fitting is tightened.This design makes flareless hydraulic fittings particularly well-suited for field installation, maintenance environments, and applications where tube preparation equipment is unavailable or impractical. The result is a strong, leak-resistant hydraulic connection that can be made with standard hand tools and minimal tube preparation.
Flareless fittings are also commonly referred to as:
- Compression grip fittings — referencing the compressive gripping action of the ferrule on the tube OD
- Bite-type hydraulic fittings — referencing the cutting ring or ferrule that bites into the tube surface to create the seal and mechanical grip
- SAE J514 fittings — the dimensional and performance standard governing flareless fitting design and interchangeability
How Flareless Hydraulic Fittings Work
Flareless hydraulic components and fittings are connected via a precise three-piece mechanical assembly. Understanding each component clarifies why the system performs reliably across demanding hydraulic applications:The Body
The fitting body contains the internal geometry that accepts the tube end and guides ferrule engagement during assembly. The body thread and internal seat are machined to SAE J514 dimensional standards, ensuring consistent ferrule engagement and cross-manufacturer interchangeability.The Ferrule (Cutting Ring)
The ferrule, sometimes called a cutting ring or bite ring in bite-type hydraulic fitting applications, is the functional heart of the flareless connection. As the nut is tightened, the ferrule is driven forward and compressed against the tube OD. Depending on the ferrule design, this action either bites into the tube surface or compresses tightly around it, creating both the mechanical grip that resists pull-out and the seal that prevents fluid leakage.The Nut
The nut drives the ferrule forward during assembly and maintains clamping force once the fitting is fully torqued. The three-piece assembly, body, ferrule, and nut, works together to create a connection whose strength and seal integrity are determined by mechanical engagement rather than tube preparation quality.Pre-Setting the Ferrule
For optimal performance, flareless hydraulic fittings are typically pre-set using a fitting body or dedicated pre-setting tool prior to installation in the system. Pre-setting ensures consistent ferrule engagement, reduces the risk of assembly variation, and simplifies final installation, particularly in field service and maintenance applications.Flareless Hydraulic Fitting Advantages
Engineers, procurement teams, and maintenance professionals specify compression grip fittings and bite-type hydraulic fittings because they deliver a consistent combination of performance, practicality, and long-term reliability:- No Tube Flaring Required
- Leak-Resistant Performance
- Vibration & Shock Resistance
- Field Installation Friendly
- SAE J514 Interchangeability
- Reusability
Flareless Hydraulic Fitting Applications
Bite-type hydraulic fittings and compression grip fittings are specified across a wide range of industries and equipment types where reliable tube connections, field serviceability, and hydraulic system integrity are essential:- Mobile & Construction Equipment
- Industrial Hydraulic Machinery
- Agricultural Equipment
- Oil & Gas Equipment
- Marine & Offshore Hydraulics
- Fluid Power Test & Laboratory Systems
Compression Grip Fitting Available Configurations
Universal Power Conversion offers flareless hydraulic fittings in a comprehensive range of configurations to support straight runs, directional changes, branching, union connections, and system adaptation requirements:| Available Configurations | Description |
| Straight Fittings | Inline tube-to-port and tube-to-tube connections in male and female configurations across a full range of tube OD and thread sizes. |
| Elbow Fittings | 45° and 90° elbow configurations for routing hydraulic tubes around obstructions or optimizing tube layout in space-constrained installations. |
| Tee Fittings | Branch connection fittings for splitting or combining hydraulic flow — available in equal and reducing branch configurations to suit system design requirements. |
| Union Fittings | Tube-to-tube union connections for joining two tube ends inline — useful for system extensions, repairs, and maintenance applications where a fitting body port is not available. |
| Bulkhead Fittings | Panel and bulkhead mount configurations for routing hydraulic tubes through enclosures, machine frames, or structural panels cleanly and securely. |
| Adapters & Cross-Standard Configurations | Flareless-to-NPT, flareless-to-BSP, flareless-to-JIC, and other adapter configurations for integrating compression grip fittings into systems with mixed connection standards. |
SAE J514 Standard & Interchangeability
All Universal Power Conversion flareless hydraulic fittings are manufactured to SAE J514 dimensional standards, the recognized industry specification governing the geometry, thread form, and performance requirements of flareless fittings.SAE J514 compliance means:
- Consistent dimensional interchangeability with other SAE J514-compliant fitting manufacturers
- Predictable ferrule engagement and pre-setting behavior across fitting brands
- Confidence in pressure rating and performance consistency for system design and maintenance planning
- Simplified multi-source procurement for maintenance stocking and OEM supply chain management
For engineers and procurement teams working with existing SAE J514-specified systems, Universal Power Conversion flareless fittings are a direct, compatible source.