Part Number: FS2403-SS

SAE ORFS Tube Union (Stainless Steel)

Product Overview

The Delphi Fittings Part FS2403-SS is a straight union designed to connect two female O-Ring Face Seal (ORFS) swivel fittings or prepared tubes of the same size. Manufactured from high-grade stainless steel (typically 316 SS), this fitting provides a robust, leak-free connection ideal for high-pressure hydraulic systems in corrosive or high-purity environments. In conformance with SAE J1453 standards, the seal is achieved via an O-ring on the flat face of the male ends, offering superior performance against vibration, shock, and temperature cycling.

Key Features & Specifications

Material	High-Grade Stainless Steel (Typically 316 SS)
End 1 & 2 Configuration	Male O-Ring Face Seal (ORFS) (per SAE J1453 / ISO 8434-3)
Body Style	Straight Union with Hex Body for wrench tightening.
Sealing Mechanism	An elastomeric O-ring on each male flat face creates a seal when compressed against the flat face of the mating female ORFS swivel.
Primary Function	To connect two female ORFS hose ends or prepared tubes of the same size in a straight line.
O-Ring Compatibility	Requires an O-ring for each end (sold separately). O-ring material (e.g., Viton®, Buna-N) must be selected for compatibility with system fluid and temperature.

Commonly Available Sizes (Part #FS2403-SS Series)

Delphi Fittings offers the Stainless Steel ORFS Tube Union in various standard sizes.

Examples include (Male ORFS x Male ORFS):

FS2403-04-SS: 1/4" Tube (9/16-18 Thread)
FS2403-06-SS: 3/8" Tube (11/16-16 Thread)
FS2403-08-SS: 1/2" Tube (13/16-16 Thread)
FS2403-10-SS: 5/8" Tube (1-14 Thread)
FS2403-12-SS: 3/4" Tube (1-3/16-12 Thread)
FS2403-16-SS: 1" Tube (1-7/16-12 Thread)

Note: For unlisted sizes or specific requirements, please contact our sales team.

Applications

The FS2403-SS Stainless Steel ORFS Tube Union is the ideal choice for demanding applications where both leak-free performance and corrosion resistance are critical:

Marine & Offshore: Resists corrosion from saltwater and harsh marine environments in steering systems, winches, and deck machinery.
Chemical Processing: Safely handles corrosive fluids and withstands aggressive chemical environments.
Food & Beverage: Meets hygienic standards and resists corrosion from food products and cleaning agents.
Pharmaceutical & Biotech: Ensures system purity and is suitable for sanitary applications.
High-Vibration Systems: The soft O-ring seal provides excellent resistance to leaks caused by system vibration and shock, common in mobile and industrial machinery.
Any high-pressure system where environmental conditions or fluid type make standard carbon steel unsuitable.

Installation & Usage Guidelines

Ensure the flat sealing faces on both the union and the mating female swivels are clean, smooth, and free of scratches or debris.
Select the correct size and material O-ring (Viton® is common for stainless steel applications) for each end. Inspect O-rings for any cuts or defects.
Apply a light coat of system-compatible lubricant to each O-ring before placing it securely in the groove on the male faces.
Align the union with the female swivel fittings squarely to prevent cross-threading.
Thread the female swivel nuts onto the union and tighten until finger-tight.
Use two wrenches—one to hold the union body steady and one to tighten the female swivel nut—to the manufacturer's recommended torque specification. Do not over-tighten.

Why Choose Delphi Fittings Part FS2403-SS?

Superior Leak Protection: The O-Ring Face Seal design is recognized as one of the best for preventing leaks in high-pressure and high-vibration applications.
Exceptional Corrosion Resistance: Manufactured from high-grade stainless steel (typically 316 SS) for maximum longevity in harsh environments.
High-Pressure Capability: Engineered to withstand demanding hydraulic system pressures, providing a secure and reliable connection.
Reusable & Reliable: The fitting's metal components offer excellent durability, while the O-ring can be easily replaced during maintenance, ensuring a reliable seal after reassembly.

Get a Quote for Part FS2403-SS - Stainless Steel ORFS Union

For critical hydraulic systems requiring the ultimate protection against both leaks and corrosion, the Part FS2403-SS ORFS Union is the premier choice. Contact Delphi Fittings today for wholesale pricing, bulk order information, and dedicated engineering support.

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