Part Number: 6405

SAE ORB Male x NPTF Pipe Female Adapter

Product Overview

The Delphi Fittings Part 6405 is a straight adapter designed to connect a male NPTF (National Pipe Taper Fuel / Dryseal) pipe or fitting to a female SAE O-Ring Boss (ORB) port. This adapter features a male SAE O-Ring Boss (ORB) thread on one end, which seals with an O-ring in the ORB port, and a female NPTF pipe thread on the other end to accept the male NPTF component. This configuration is essential for integrating NPTF-threaded components into hydraulic systems or equipment that utilize SAE ORB ports. Manufactured from high-quality carbon steel and zinc-plated for corrosion resistance, the Part 6405 adapter provides a secure and leak-proof transition between these two distinct thread types.

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	Female 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 (supplied with this male ORB fitting) seals against the boss in the female ORB port. NPTF End: Metal-to-metal seal on the tapered Dryseal threads with the mating male NPTF fitting.
Corrosion Protection	Standard Zinc Plating for enhanced durability.
Primary Function	To connect a male NPTF pipe or fitting to a female SAE O-Ring Boss 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 #6405 Series)

Delphi Fittings offers the SAE ORB Male x NPTF Pipe Female Adapter in a variety of common ORB and NPTF size combinations. Sizes are typically denoted by ORB dash numbers (for the male ORB end) and NPTF nominal pipe sizes (for the female NPTF end).

Examples include (Male ORB x Female NPTF):

6405-04-02: -04 (7/16-20) ORB Male x 1/8" NPTF Female
6405-04-04: -04 (7/16-20) ORB Male x 1/4" NPTF Female
6405-06-04: -06 (9/16-18) ORB Male x 1/4" NPTF Female
6405-06-06: -06 (9/16-18) ORB Male x 3/8" NPTF Female
6405-08-06: -08 (3/4-16) ORB Male x 3/8" NPTF Female
6405-08-08: -08 (3/4-16) ORB Male x 1/2" NPTF Female
6405-10-08: -10 (7/8-14) ORB Male x 1/2" NPTF Female
6405-12-12: -12 (1-1/16-12) ORB Male x 3/4" NPTF Female
6405-16-16: -16 (1-5/16-12) ORB Male x 1" NPTF Female

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 6405 adapter is crucial for connecting NPTF male-ended components to SAE ORB ports:

Connecting NPTF-threaded pipes, hoses with NPTF male ends, or accessories like pressure gauges and sensors to components with female ORB ports (e.g., hydraulic pumps, valves, cylinders, manifolds).
Integrating NPTF standard components into systems predominantly utilizing SAE O-Ring Boss connections.
Use in mobile equipment (construction, agriculture), industrial machinery, and hydraulic power units where different thread standards need to be interfaced.
Facilitating system assembly, modifications, or repairs involving these two common hydraulic thread types.

Installation & Usage Guidelines

Ensure all threads and sealing surfaces (this adapter's male ORB O-ring groove, mating female ORB port boss, this adapter's female NPTF threads, and mating male NPTF fitting threads) are clean, undamaged, and free of contaminants.
For the male ORB end of this adapter, ensure the O-ring is correctly sized, lubricated with system-compatible fluid, and properly seated in its groove. Thread this male ORB end into the mating female ORB port by hand, then tighten with a wrench to the recommended torque for the ORB size.
For the female NPTF end of this adapter, thread the mating male NPTF pipe or fitting into it. 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 male threads. Tighten with a wrench to the recommended specification.
Use backup wrenches on the adapter body and mating components as needed to prevent distortion or damage during tightening.

Why Choose Delphi Fittings Part 6405?

Reliable ORB to NPTF Connection: Provides a secure and effective means to connect male NPTF components to female SAE O-Ring Boss ports.
Superior ORB Sealing: The male ORB end utilizes an O-ring for a high-integrity seal in the mating port.
Robust NPTF Interface: The female NPTF end provides a strong, tapered thread connection for male NPTF fittings.
High-Pressure Capability: Suitable for demanding hydraulic applications requiring dependable sealing.
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 6405 - SAE ORB Male x NPTF Pipe Female Adapter

For dependable straight adapter connections from SAE O-Ring Boss ports to male NPTF fittings, the Part 6405 is an essential component. Contact Delphi Fittings for wholesale pricing, bulk order information, and expert assistance with your fitting requirements.

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