Part Number: 6401

SAE ORB Male x NPTF Pipe Male Adapter

Product Overview

The Delphi Fittings Part 6401 is a straight adapter designed to provide a reliable connection between a female SAE O-Ring Boss (ORB) port and a female NPTF (National Pipe Taper Fuel / Dryseal) port. This fitting features a male SAE O-Ring Boss thread on one end and a male NPTF pipe thread on the other. It is essential for integrating components with ORB connections into systems utilizing NPTF threads, or vice-versa. Manufactured from high-quality carbon steel and zinc-plated for corrosion resistance, the Part 6401 adapter ensures a secure, leak-resistant transition between these two distinct hydraulic connection standards.

Key Features & Specifications

Material	High-Grade Carbon Steel
End 1 Configuration	Male SAE O-Ring Boss (ORB) (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: O-ring seal compressed into the port's boss. NPTF End: Metal-to-metal seal on the tapered Dryseal threads.
Corrosion Protection	Standard Zinc Plating for enhanced durability.
Primary Function	To connect a female SAE O-Ring Boss port to a female NPTF port.
Working Pressure	Suitable for high-pressure hydraulic applications. Specific ratings vary by size.
O-Ring Material (for ORB end)	Typically Buna-N (Nitrile) 90 Durometer. Viton® or other materials available upon request.

Commonly Available Sizes (Part #6401 Series)

Delphi Fittings offers the SAE ORB Male x NPTF Pipe Male Adapter in a comprehensive range of common ORB and NPTF size combinations. Sizes are typically denoted by ORB dash numbers and NPTF nominal pipe sizes.

Examples include (Male ORB x Male NPTF):

6401-04-02: -04 (7/16-20) ORB Male x 1/8" NPTF Male
6401-04-04: -04 (7/16-20) ORB Male x 1/4" NPTF Male
6401-06-04: -06 (9/16-18) ORB Male x 1/4" NPTF Male
6401-06-06: -06 (9/16-18) ORB Male x 3/8" NPTF Male
6401-08-06: -08 (3/4-16) ORB Male x 3/8" NPTF Male
6401-08-08: -08 (3/4-16) ORB Male x 1/2" NPTF Male
6401-10-08: -10 (7/8-14) ORB Male x 1/2" NPTF Male
6401-12-12: -12 (1-1/16-12) ORB Male x 3/4" NPTF Male
6401-16-16: -16 (1-5/16-12) ORB Male x 1" NPTF Male

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 6401 adapter is crucial for bridging SAE ORB and NPTF threaded systems:

Connecting hydraulic components with ORB ports (e.g., pumps, valves) to piping systems or components using NPTF threads.
Integrating NPTF-ported accessories like gauges or sensors into an ORB-based hydraulic circuit.
Mobile equipment, agricultural machinery, and industrial hydraulic systems where both ORB and NPTF connections are present.
Facilitating system modifications or retrofits involving components with different thread standards.

Installation & Usage Guidelines

Ensure all threads and sealing surfaces (ORB O-ring groove and port boss, NPTF threads) are clean, undamaged, and free from contaminants.
For the ORB end, ensure the O-ring is correctly sized, lubricated with system-compatible fluid, and properly seated in its groove on the male ORB fitting. Thread the male ORB end into the female ORB port by hand, then tighten with a wrench to the recommended torque.
For the NPTF end, thread the male NPTF into the female NPTF port by hand. 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 threads, to enhance sealing and prevent galling. Tighten with a wrench to the recommended specification (typically 1.5 to 3 turns past hand-tight, depending on size).
Use backup wrenches where appropriate to prevent distortion of lines or components.

Why Choose Delphi Fittings Part 6401?

Reliable Inter-Standard Connection: Provides a secure and leak-resistant bridge between SAE O-Ring Boss and NPTF threaded systems.
Dual Sealing Technologies: Combines the superior O-ring seal of ORB with the robust tapered thread seal of NPTF.
High-Pressure Capability: Suitable for demanding hydraulic applications.
Durable Carbon Steel: Ensures strength and long service life 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 6401 - SAE ORB Male x NPTF Pipe Male Adapter

For dependable straight adapter connections between SAE O-Ring Boss and NPTF systems, the Part 6401 is an essential component. Contact Delphi Fittings for wholesale pricing, bulk order information, and expert assistance with your fitting requirements.

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