DELPHI FITTINGS
Product Overview
The Delphi Fittings Part FS2703 is an SAE O-Ring Face Seal (ORFS) Male Bulkhead Branch Tee. This specialized fitting is designed to create a T-junction for hydraulic lines where one of the branch connections needs to pass through a panel, bulkhead, or equipment wall, providing a secure mounting point. It typically features male ORFS flat face ends with O-ring grooves on all three ports (two on the run and one on the bulkhead branch) and includes a locknut for panel installation. This configuration is ideal for routing a hydraulic line to or from a panel while also splitting or joining with other ORFS lines. Manufactured from high-quality carbon steel and zinc-plated for corrosion resistance, the FS2703 bulkhead branch tee conforms to SAE J1453 / ISO 8434-3 standards, ensuring high-integrity, leak-free performance in demanding hydraulic systems.
Key Features & Specifications
| Material | High-Grade Carbon Steel |
|---|---|
| End 1 Configuration (Run) | Male SAE O-Ring Face Seal (ORFS) (conforming to SAE J1453 / ISO 8434-3) |
| End 2 Configuration (Run) | Male SAE O-Ring Face Seal (ORFS) (conforming to SAE J1453 / ISO 8434-3) |
| End 3 Configuration (Bulkhead Branch) | Male SAE O-Ring Face Seal (ORFS) (conforming to SAE J1453 / ISO 8434-3) |
| Body Style | Bulkhead Branch Tee with a threaded body section on one branch for panel mounting and a separate locknut. Hexagonal features for wrenching. |
| Sealing Mechanism | All ORFS Ends: Utilize an elastomeric O-ring (seated in the groove on each male ORFS face) which compresses against the flat face of the mating female ORFS swivel fitting or prepared tube end, creating a superior static face seal. Bulkhead Seal: The locknut mechanically secures the branch of the tee to the panel. An additional washer or sealant may be used by the installer for environmental sealing if required. |
| Included Component | Locknut (e.g., Part FS306 ORFS Bulkhead Locknut) for the bulkhead branch end. |
| Primary Function | To provide a T-junction for ORFS hydraulic lines where one branch passes through and is secured to a panel or bulkhead, connecting to female ORFS swivel fittings or prepared tubes on all three ports. |
| O-Ring Material (for all ORFS ends) | Typically Buna-N (Nitrile) 90 Durometer as standard. Viton® (FKM) or other materials available upon request. O-rings are supplied with the fitting. |
| Plating & Finish | Cr3+ Trivalent Zinc Clear (ASTM B117 salt spray tested) |
| Reference Standard | SAE J1453 / ISO 8434-3 (O-Ring Face Seal Standard) |
Commonly Available Sizes (Part #FS2703 Series)
Delphi Fittings manufactures standard and custom dash sizes for Part FS2703. Engineering specifications, dimensions, and thread/flange sizes are detailed below:
| Delphi Part # | Size / Nominal Dimension | Standard Specification | Configuration |
|---|---|---|---|
| FS2703-04 | All ends 1/4" (-04) ORFS (9/16-18 UNF Thread) | SAE Standard | Standard Production |
| FS2703-06 | All ends 3/8" (-06) ORFS (11/16-16 UNF Thread) | SAE Standard | Standard Production |
| FS2703-08 | All ends 1/2" (-08) ORFS (13/16-16 UNF Thread) | SAE Standard | Standard Production |
| FS2703-10 | All ends 5/8" (-10) ORFS (1-14 UNS Thread) | SAE Standard | Standard Production |
| FS2703-12 | All ends 3/4" (-12) ORFS (1-3/16-12 UN Thread) | SAE Standard | Standard Production |
Need non-standard dash sizes, custom flange drops, special port configurations, or alternative material grades (AISI 316 Stainless / Brass)? Delphi manufactures custom components to client blueprints.
Specific Applications & Hydraulic Circuit Routing
Part FS2703 fittings provide reliable fluid power conveyance in demanding mobile and stationary equipment circuits:
- High-Vibration Mobile Equipment: Excavator booms, mining equipment, and hydrostatic drives where Part FS2703 prevents hydraulic weeping under intense shock loads.
- Zero-Clearance Manifold Assembly: Flat face design allows slip-in component replacement without springing or spreading rigid hydraulic tubes.
- Extreme Pressure Impulse Circuits: Elastomeric face seal remains 100% leak-free throughout repetitive thermal cycles and impulse spikes.
Installation & Assembly Guidance
- O-Ring Retention Inspection: Inspect the machined face groove to ensure the O-ring is properly seated and retained prior to mating.
- Face-to-Face Alignment: Bring the flat faces into parallel contact before hand-threading the swivel nut to avoid pinching the O-ring.
- Calibrated Torque Tightening: Tighten the nut to the specified SAE J1453 torque value using a calibrated torque wrench.
- Dual-Wrench Counter-Torque: Always hold the fitting body hex with a backup wrench while torquing the connection to prevent twisting.
Why Source Part FS2703 from Delphi Fittings?
- Strict Dimensional Precision: CNC machined to exacting tolerances for 100% interchangeability with North American and international systems.
- ASTM B117 Salt Spray Corrosion Protection: Electroplated with eco-friendly Cr3+ trivalent zinc clear for extended service life in harsh operating environments.
- 100% Thread & Seal Inspection: Every production batch undergoes strict optical and mechanical gauge inspection before packaging.
- Factory-Direct OEM Supply: Direct manufacturer pricing, full mill test reports (MTR), and ISO 9001:2015 quality assurance from Yuhuan, China.
Get a Quote for Part FS2703 - SAE ORFS Male Bulkhead Branch Tee
Direct OEM container-load and distributor replenishment pricing, complete material test reports (MTR), and inspection samples available upon inquiry. Connect with our engineering sales team for rapid quotations and delivery schedules.
Complementary & Mating Hydraulic Fittings
Commonly paired with Part FS2703 in hydraulic valve manifolds, power units, and industrial fluid power circuits:
