FS2700-LN ORFS Bulkhead Union with Locknut | Hydraulic Bulkhead Union Fittings
Gear House Hydraulics FS2700-LN ORFS Bulkhead Union is designed for hydraulic lines that need to pass securely through a panel, machine wall, bracket, or bulkhead. It combines Male ORFS × Male ORFS connections with an integrated locknut, giving the fitting a fixed mounting point while maintaining a straight hydraulic connection.
Key Specifications
- Part Series: FS2700-LN
- Connection: Male ORFS × Male ORFS
- Fitting Type: Straight Bulkhead Union
- Seal Type: O-Ring Face Seal (ORFS)
- Mounting: Bulkhead with Locknut
- Material: Steel
- Pressure: Up to 6,000 PSI, depending on size and system configuration
- Standard: SAE J1453 ORFS configuration
Filter Products
Material
Size
Secure Panel Mounting with an Integrated Locknut
The biggest advantage of the FS2700-LN is the locknut.
Instead of simply connecting two hydraulic lines, this fitting is designed to be mounted through a panel or equipment wall. Once positioned, the locknut secures the fitting against the mounting surface.
This makes it a practical choice for hydraulic systems where fittings may be exposed to:
- Equipment vibration
- Mechanical movement
- Pressure cycling
- Repeated maintenance
- Limited installation space
- Heavy-duty operating conditions
The locknut helps keep the fitting properly positioned and reduces unwanted movement at the bulkhead connection.
Male ORFS × Male ORFS Connection
Both ends of the FS2700-LN are Male ORFS connections. This allows compatible ORFS hydraulic lines or female ORFS components to connect on either side of the bulkhead.
The ORFS design uses an O-ring face seal to create the sealing interface. Proper O-ring condition, alignment, fitting size, and installation are important for achieving reliable hydraulic sealing.
Why Use a Bulkhead Union?
A bulkhead fitting is useful when a hydraulic line needs to cross a structural barrier.
For example, hydraulic tubing may need to travel through:
- Machine frames
- Hydraulic cabinets
- Equipment panels
- Brackets
- Protective walls
- Manifold sections
- Enclosures
The FS2700-LN creates a dedicated connection point through that structure instead of routing a hose or tube through an unsupported opening.
Steel Construction for Heavy-Duty Hydraulic Systems
The FS2700-LN series is specified in steel construction, making it suitable for demanding hydraulic applications. Manufacturer listings identify the series as steel SAE J1453 O-Ring Face Seal bulkhead fittings with locknuts.
Steel construction provides the mechanical strength needed for hydraulic equipment operating under pressure, vibration, and repeated use.
High-Pressure Performance
The FS2700-LN is intended for high-pressure hydraulic service. Gear House Hydraulics identifies its ORFS bulkhead range for applications involving continuous mechanical shock, while comparable FS2700-LN specifications list maximum operating pressure according to fitting size.
Always confirm the pressure rating for the specific size before installation because pressure capability can vary with fitting dimensions and system configuration.
ORFS Face Seal for Leak-Resistant Connections
The O-Ring Face Seal design is one of the main reasons ORFS fittings are used in demanding hydraulic applications.
The sealing surface uses an elastomeric O-ring between the mating faces. When properly assembled, the O-ring provides a reliable sealing interface while the fitting body provides the mechanical connection.
For best performance:
Use the correct ORFS size
Inspect the O-ring before installation
Keep sealing surfaces clean
Avoid damaged or contaminated sealing surfaces
Ensure proper alignment
Follow the recommended assembly procedure
Where FS2700-LN Is Used
The FS2700-LN is well suited for hydraulic equipment where a fixed bulkhead connection is required.
Typical applications include:
Construction equipment
Agricultural machinery
Mobile hydraulic systems
Industrial hydraulic equipment
Heavy machinery
Hydraulic power units
OEM hydraulic assemblies
Hydraulic manifolds
Machine frames and panels
Fluid-power systems
Equipment exposed to vibration and mechanical shock
FS2700-LN vs. a Standard Straight ORFS Union
A standard ORFS union simply joins two compatible hydraulic connections. The FS2700-LN adds a bulkhead mounting function with a locknut.
That makes FS2700-LN a better choice when the connection must pass through a panel or machine structure and remain firmly secured in position.
The locknut is therefore not just an extra component—it is an important part of the fitting's mounting function.
Main Benefits
Male ORFS × Male ORFS configuration
Integrated locknut
Straight bulkhead design
O-Ring Face Seal connection
Steel construction
Multiple sizes available
Designed for panel and bulkhead mounting
Suitable for high-pressure hydraulic applications
Helps maintain a fixed connection position
Useful in vibration-prone equipment
Suitable for mobile and industrial hydraulics
Built for Practical Hydraulic Installation
When hydraulic lines have to pass through a machine panel, simply drilling a hole and routing a hose through it can leave the connection unsupported and difficult to service.
The FS2700-LN ORFS Bulkhead Union with Locknut provides a dedicated mounting solution. The fitting passes through the panel, the locknut secures it, and the Male ORFS ends provide connection points on both sides.
This creates a cleaner and more controlled hydraulic installation while making future maintenance easier.
Choose Gear House Hydraulics
Gear House Hydraulics provides the FS2700-LN series for hydraulic applications requiring a secure ORFS bulkhead connection with locknut.
Choose the correct size based on your ORFS connection, tubing or hose requirements, panel installation, and operating pressure. With its steel construction, straight-through design, and integrated locknut, the FS2700-LN is a practical solution for demanding hydraulic equipment.
Frequently Asked Questions
What is an FS2700-LN ORFS Bulkhead Union?
The FS2700-LN is a Male ORFS × Male ORFS straight bulkhead fitting with a locknut, designed to connect hydraulic lines through a panel or machine wall.
What does the LN mean?
LN means Lock Nut. The FS2700-LN includes the locknut for securing the bulkhead fitting during panel mounting.
Does FS2700-LN have Male ORFS connections?
Yes. Both ends use Male ORFS connections.
What is the main purpose of the locknut?
The locknut secures the bulkhead fitting to a panel, bracket, or equipment wall and helps keep the fitting firmly positioned.
What material is FS2700-LN?
The FS2700-LN series is available in steel construction.
Is FS2700-LN suitable for high-pressure hydraulics?
Yes. It is designed for high-pressure hydraulic applications, but the exact pressure rating should be confirmed for the specific fitting size and complete system.
What sizes are available?
The FS2700-LN series is available across multiple ORFS sizes, from 1/4" through 1-1/2" in the standard size range.
Where can I use an FS2700-LN?
It can be used in mobile hydraulics, construction equipment, agricultural machinery, industrial equipment, hydraulic power units, OEM assemblies, and other systems requiring a secured bulkhead connection.
What is the difference between FS2700 and FS2700-LN?
The FS2700-LN includes the locknut for securing the fitting through a panel or bulkhead. The locknut is the key feature that makes the LN version suitable for fixed panel mounting.ORFS Face Seal for Leak-Resistant Connections
The O-Ring Face Seal design is one of the main reasons ORFS fittings are used in demanding hydraulic applications.
The sealing surface uses an elastomeric O-ring between the mating faces. When properly assembled, the O-ring provides a reliable sealing interface while the fitting body provides the mechanical connection.
For best performance:
Use the correct ORFS size
Inspect the O-ring before installation
Keep sealing surfaces clean
Avoid damaged or contaminated sealing surfaces
Ensure proper alignment
Follow the recommended assembly procedure
Where FS2700-LN Is Used
The FS2700-LN is well suited for hydraulic equipment where a fixed bulkhead connection is required.
Typical applications include:
Construction equipment
Agricultural machinery
Mobile hydraulic systems
Industrial hydraulic equipment
Heavy machinery
Hydraulic power units
OEM hydraulic assemblies
Hydraulic manifolds
Machine frames and panels
Fluid-power systems
Equipment exposed to vibration and mechanical shock
FS2700-LN vs. a Standard Straight ORFS Union
A standard ORFS union simply joins two compatible hydraulic connections. The FS2700-LN adds a bulkhead mounting function with a locknut.
That makes FS2700-LN a better choice when the connection must pass through a panel or machine structure and remain firmly secured in position.
The locknut is therefore not just an extra component—it is an important part of the fitting's mounting function.
Main Benefits
Male ORFS × Male ORFS configuration
Integrated locknut
Straight bulkhead design
O-Ring Face Seal connection
Steel construction
Multiple sizes available
Designed for panel and bulkhead mounting
Suitable for high-pressure hydraulic applications
Helps maintain a fixed connection position
Useful in vibration-prone equipment
Suitable for mobile and industrial hydraulics
Built for Practical Hydraulic Installation
When hydraulic lines have to pass through a machine panel, simply drilling a hole and routing a hose through it can leave the connection unsupported and difficult to service.
The FS2700-LN ORFS Bulkhead Union with Locknut provides a dedicated mounting solution. The fitting passes through the panel, the locknut secures it, and the Male ORFS ends provide connection points on both sides.
This creates a cleaner and more controlled hydraulic installation while making future maintenance easier.
Choose Gear House Hydraulics
Gear House Hydraulics provides the FS2700-LN series for hydraulic applications requiring a secure ORFS bulkhead connection with locknut.
Choose the correct size based on your ORFS connection, tubing or hose requirements, panel installation, and operating pressure. With its steel construction, straight-through design, and integrated locknut, the FS2700-LN is a practical solution for demanding hydraulic equipment.
Frequently Asked Questions
What is an FS2700-LN ORFS Bulkhead Union?
The FS2700-LN is a Male ORFS × Male ORFS straight bulkhead fitting with a locknut, designed to connect hydraulic lines through a panel or machine wall.
What does the LN mean?
LN means Lock Nut. The FS2700-LN includes the locknut for securing the bulkhead fitting during panel mounting.
Does FS2700-LN have Male ORFS connections?
Yes. Both ends use Male ORFS connections.
What is the main purpose of the locknut?
The locknut secures the bulkhead fitting to a panel, bracket, or equipment wall and helps keep the fitting firmly positioned.
What material is FS2700-LN?
The FS2700-LN series is available in steel construction.
Is FS2700-LN suitable for high-pressure hydraulics?
Yes. It is designed for high-pressure hydraulic applications, but the exact pressure rating should be confirmed for the specific fitting size and complete system.
What sizes are available?
The FS2700-LN series is available across multiple ORFS sizes, from 1/4" through 1-1/2" in the standard size range.
Where can I use an FS2700-LN?
It can be used in mobile hydraulics, construction equipment, agricultural machinery, industrial equipment, hydraulic power units, OEM assemblies, and other systems requiring a secured bulkhead connection.
What is the difference between FS2700 and FS2700-LN?
The FS2700-LN includes the locknut for securing the fitting through a panel or bulkhead. The locknut is the key feature that makes the LN version suitable for fixed panel mounting.