DELPHI FITTINGS
Part Number: 304
37° JIC Long Flare Nut
Product Overview
The Delphi Fittings Part 304 is a 37° JIC Long Flare Nut, often referred to as the standard length JIC nut. This female threaded component is essential for assembling reliable JIC flare connections with hydraulic tubing. It is designed to be used with a JIC tube sleeve (such as Delphi Part #319) and a 37° flared tube end to connect securely to a male JIC fitting. The 'long' designation indicates its standard industry profile, which provides robust thread engagement and a substantial surface area for wrenching. Manufactured from high-quality carbon steel and zinc-plated for excellent corrosion resistance, the Part 304 nut meets SAE J514 specifications, ensuring dependable performance in demanding hydraulic applications.
Key Features & Specifications
| Material | High-Grade Carbon Steel |
|---|---|
| Thread Type | Female JIC 37° Flare (UNF) (per SAE J514 / ISO 8434-2) |
| Design | Standard/Long pattern nut, providing optimal thread engagement. |
| Body Style | Hexagonal nut for secure wrench tightening. |
| Compatibility | Specifically designed for use with a JIC Tube Sleeve (Delphi Part #319) and a correctly 37° flared tube. |
| Sealing Mechanism | Applies clamping force to the flared tube and sleeve assembly, pressing it against the 37° cone of a male JIC fitting to create a secure metal-to-metal seal. |
| Corrosion Protection | Standard Zinc Plating for enhanced durability and resistance to rust. |
| Primary Function | To secure a flared tube and sleeve assembly to a male JIC 37° flare fitting, forming a high-integrity, leak-proof connection. |
| Working Pressure | Suitable for high-pressure hydraulic systems when correctly assembled with compatible tubing, sleeve, and male fitting. Pressure ratings are dependent on tube size and material. |
Commonly Available Sizes (Part #304 Series)
Delphi Fittings offers the 37° JIC Long Flare Nut in a full range of sizes corresponding to standard hydraulic tube outer diameters (OD) and JIC/UNF thread specifications.
Examples include:
- 304-04: For 1/4" Tube OD (7/16-20 UNF Thread)
- 304-05: For 5/16" Tube OD (1/2-20 UNF Thread)
- 304-06: For 3/8" Tube OD (9/16-18 UNF Thread)
- 304-08: For 1/2" Tube OD (3/4-16 UNF Thread)
- 304-10: For 5/8" Tube OD (7/8-14 UNF Thread)
- 304-12: For 3/4" Tube OD (1-1/16-12 UNF Thread)
- 304-14: For 7/8" Tube OD (1-3/16-12 UNF Thread)
- 304-16: For 1" Tube OD (1-5/16-12 UNF Thread)
- 304-20: For 1-1/4" Tube OD (1-5/8-12 UNF Thread)
- 304-24: For 1-1/2" Tube OD (1-7/8-12 UNF Thread)
- 304-32: For 2" Tube OD (2-1/2-12 UNF Thread)
Note: It is critical to always use this nut with the corresponding JIC tube sleeve (e.g., Delphi Part #319) for proper assembly and optimal sealing performance. For unlisted sizes or specific requirements, please contact our sales team.
Applications
The Part 304 JIC Long Flare Nut is the standard choice for a wide array of applications, including:
- Creating reliable, leak-proof connections in high-pressure hydraulic systems utilizing flared metal tubing.
- General use in mobile equipment (such as construction and agricultural machinery), industrial machinery, manufacturing systems, and diverse fluid power applications where JIC flare tube connections are specified.
- New assemblies and repair of hydraulic lines that require standard JIC fittings.
- Suitable for use with various hydraulic fluids compatible with carbon steel.
Installation & Usage Guidelines
- Ensure the hydraulic tube end has been accurately flared to a 37° angle using a proper flaring tool and is free of any cracks, burrs, or surface imperfections.
- Slide the Part 304 JIC Long Flare Nut onto the tube, ensuring the threads face the flared end.
- Next, slide the corresponding JIC Tube Sleeve (e.g., Part #319) onto the tube, with the tapered end of the sleeve oriented towards the flare.
- Align the flared tube end (now assembled with the nut and sleeve) squarely against the 37° cone of the mating male JIC fitting.
- Hand-tighten the nut onto the male fitting until it is snug and the sealing surfaces make contact.
- Use two wrenches for the final tightening process: one wrench to hold the male fitting or adapter body stationary, and the other to turn the JIC Long Flare Nut. Tighten the nut to the manufacturer's recommended torque specification or by using the "Flats From Wrench Resistance" (FFWR) method appropriate for the specific tube size and material.
- Achieving the correct torque is essential for a secure, leak-free seal without over-tightening, which could damage the flare, the nut, or the male fitting.
Why Choose Delphi Fittings Part 304?
- Standardized Design: The long pattern nut is the industry standard, providing ample thread engagement and a generous surface for wrench grip, ensuring a secure connection.
- Reliable JIC Connection: Forms a highly dependable metal-to-metal seal when correctly assembled with a properly flared tube and JIC sleeve, suitable for high-pressure environments.
- High-Pressure Performance: Engineered to withstand the rigorous demands and pressures typical of hydraulic systems.
- Durable Material: Manufactured from high-grade carbon steel, offering excellent strength and mechanical integrity.
- Enhanced Corrosion Resistance: Standard zinc plating provides robust protection against corrosion, extending service life.
- Standard Compliance: Fully meets SAE J514 / ISO 8434-2 specifications for JIC flare fitting components, ensuring global interchangeability and compatibility.
- Quality Manufacturing: Produced under Delphi Fittings' stringent ISO 9001:2015 certified quality management system.
Get a Quote for Part 304 - 37° JIC Long Flare Nut
For standard, reliable, and high-quality JIC tube connections, the Part 304 Long Flare Nut is an industry-standard component trusted in countless hydraulic applications. Contact Delphi Fittings today for wholesale pricing, bulk order information, and expert technical support.
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