DELPHI FITTINGS
Part Number: 6404
SAE ORB Female x NPTF Pipe Male Adapter
Product Overview
The Delphi Fittings Part 6404 is a straight adapter designed to connect a male SAE O-Ring Boss (ORB) fitting to a female NPTF (National Pipe Taper Fuel / Dryseal) port. This adapter features a female SAE O-Ring Boss (ORB) end, which includes the necessary machined boss to accept and seal with the O-ring on a male ORB fitting, and a male NPTF pipe thread on the other end. This configuration allows for the integration of ORB components into systems predominantly using NPTF threads. Manufactured from high-quality carbon steel and zinc-plated for excellent corrosion resistance, the Part 6404 ensures a reliable and leak-proof connection between these two different hydraulic thread types. The note on the category page, "Sealing via ORB threads not standard," refers to the fundamental principle that in an ORB connection, the seal is made by the O-ring on the male fitting compressing against the boss in the female port, not by thread interference.
Key Features & Specifications
| Material | High-Grade Carbon Steel |
|---|---|
| End 1 Configuration | Female SAE O-Ring Boss (ORB) (designed to accept Male ORB fitting, per SAE J1926-1 / ISO 11926-1) |
| End 2 Configuration | Male NPTF Pipe (Dryseal) (per ANSI B1.20.3 / SAE J476) |
| Body Style | Straight Adapter with Hex Body for wrench tightening. |
| Sealing Mechanism | ORB End: Seals via the O-ring on the mating Male ORB fitting against the internal boss of this adapter's female ORB port. NPTF End: Metal-to-metal seal on the tapered Dryseal threads with a female NPTF port. |
| Corrosion Protection | Standard Zinc Plating for enhanced durability. |
| Primary Function | To connect a male SAE O-Ring Boss fitting to a female NPTF port. |
| Working Pressure | Suitable for high-pressure hydraulic applications. Specific ratings vary by size. |
Commonly Available Sizes (Part #6404 Series)
Delphi Fittings offers the SAE ORB Female x NPTF Pipe Male Adapter in a range of common ORB and NPTF size combinations. Sizes are typically denoted by ORB dash numbers (for the female ORB end) and NPTF nominal pipe sizes (for the male NPTF end).
Examples include (Female ORB x Male NPTF):
- 6404-04-02: -04 (7/16-20) Female ORB x 1/8" Male NPTF
- 6404-04-04: -04 (7/16-20) Female ORB x 1/4" Male NPTF
- 6404-06-04: -06 (9/16-18) Female ORB x 1/4" Male NPTF
- 6404-06-06: -06 (9/16-18) Female ORB x 3/8" Male NPTF
- 6404-08-06: -08 (3/4-16) Female ORB x 3/8" Male NPTF
- 6404-08-08: -08 (3/4-16) Female ORB x 1/2" Male NPTF
- 6404-10-08: -10 (7/8-14) Female ORB x 1/2" Male NPTF
- 6404-12-12: -12 (1-1/16-12) Female ORB x 3/4" Male NPTF
- 6404-16-16: -16 (1-5/16-12) Female ORB x 1" Male NPTF
Note: Always verify the specific ORB and NPTF sizes required for your application. For unlisted size combinations or specific requirements, please contact our sales team.
Applications
The Part 6404 adapter is key for integrating male ORB components into NPTF systems:
- Connecting components with male SAE ORB ends (like specialized sensors or valves) to equipment or lines with female NPTF ports.
- Adapting NPTF-based systems to accept ORB-terminated hoses or tubes (when the hose/tube has a male ORB end).
- Use in mobile equipment, industrial machinery, and hydraulic power units where transitions between ORB and NPTF standards are necessary.
- Facilitating system upgrades or modifications involving components with these differing thread types.
Installation & Usage Guidelines
- Ensure all threads and sealing surfaces (this adapter's female ORB port with internal boss, mating male ORB fitting's O-ring and threads, this adapter's male NPTF threads, and mating female NPTF port) are clean, undamaged, and free of contaminants.
- For the male NPTF end of this adapter, thread it into the mating female NPTF port. While NPTF is designed for a dry seal, applying a compatible thread sealant or lubricant to the male NPTF threads is often recommended, especially for high pressures or if mating with standard NPT ports. Tighten with a wrench to the recommended specification.
- For the female ORB end of this adapter, ensure the mating male ORB fitting has its O-ring correctly sized, lubricated, and seated. Thread the male ORB fitting into this adapter's female ORB port by hand, then tighten with a wrench to the recommended torque for the ORB size. This compresses the O-ring on the male ORB fitting to create the seal.
- Use backup wrenches on the adapter body and mating components as needed to prevent distortion or damage during tightening.
Why Choose Delphi Fittings Part 6404?
- Reliable ORB to NPTF Connection: Provides a secure and effective transition from male SAE O-Ring Boss fittings to female NPTF ports.
- Proper ORB Sealing: The female ORB end is machined to SAE J1926 standards to ensure correct O-ring compression from the mating male ORB fitting.
- High-Pressure Performance: Suitable for demanding hydraulic applications requiring robust sealing.
- Durable Carbon Steel: Ensures strength and longevity in industrial environments.
- Standard Compliance: Meets SAE J1926 (ORB) and SAE J476 (NPTF) standards for compatibility.
- Quality Manufacturing: Produced under Delphi Fittings' ISO 9001:2015 certified quality management system.
Get a Quote for Part 6404 - SAE ORB Female x NPTF Pipe Male Adapter
For dependable straight adapter connections from male SAE O-Ring Boss fittings to female NPTF ports, the Part 6404 is an essential component. Contact Delphi Fittings for wholesale pricing, bulk order information, and expert assistance.
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