Part Number: 304C

37° JIC Female Tube Cap

Product Overview

The Delphi Fittings Part 304C is a 37° JIC Female Tube Cap designed to securely seal the end of a male JIC 37° flare fitting. This component consists of a female JIC swivel nut combined with an integrated sealing cap. It effectively prevents leakage and contamination in unused JIC ports or at the end of hydraulic lines. Manufactured from high-quality carbon steel and zinc-plated for corrosion resistance, the Part 304C cap ensures a reliable seal in hydraulic systems adhering to SAE J514 standards.

Key Features & Specifications

Material	High-Grade Carbon Steel
Thread Type	Female JIC 37° Flare Swivel Nut (UNF) (per SAE J514 / ISO 8434-2)
Design	Female swivel nut with an integral blanking cap.
Body Style	Hexagonal nut for secure wrench tightening.
Sealing Mechanism	The cap's internal surface is designed to seal against the 37° cone of the male JIC fitting when the swivel nut is tightened, creating a metal-to-metal seal.
Corrosion Protection	Standard Zinc Plating for enhanced durability.
Primary Function	To effectively seal off an unused male JIC 37° flare fitting or tube end, preventing fluid leaks and ingress of contaminants.
Working Pressure	Suitable for high-pressure hydraulic applications, designed to match the pressure rating of the corresponding male JIC fitting size.

Commonly Available Sizes (Part #304C Series)

Delphi Fittings offers the 37° JIC Female Tube Cap in a range of sizes to match standard male JIC flare fittings.

Examples include (for capping male JIC fittings):

304C-04: For 1/4" (7/16-20 UNF) Male JIC
304C-06: For 3/8" (9/16-18 UNF) Male JIC
304C-08: For 1/2" (3/4-16 UNF) Male JIC
304C-10: For 5/8" (7/8-14 UNF) Male JIC
304C-12: For 3/4" (1-1/16-12 UNF) Male JIC
304C-16: For 1" (1-5/16-12 UNF) Male JIC
304C-20: For 1-1/4" (1-5/8-12 UNF) Male JIC
304C-24: For 1-1/2" (1-7/8-12 UNF) Male JIC

Note: Ensure the size of the cap matches the male JIC fitting that is being sealed. For unlisted sizes or specific requirements, please contact our sales team.

Applications

The Part 304C JIC Female Tube Cap is widely used for:

Temporarily or permanently sealing unused male JIC ports on hydraulic components such as pumps, valves, cylinders, filters, and manifolds.
Capping off hydraulic lines or hoses that are terminated with male JIC fittings during system maintenance, storage, or modification.
Preventing fluid leakage from open ports and protecting the internal components of hydraulic systems from contamination by dust, dirt, and moisture.
Used across diverse industries including mobile equipment (construction, agriculture), industrial machinery, manufacturing plants, and general fluid power applications.

Installation & Usage Guidelines

Ensure the male JIC 37° flare fitting that needs to be capped is clean, and its sealing cone is free from damage, nicks, or debris.
Inspect the internal sealing surface of the Part 304C cap to ensure it is clean and undamaged.
Align the 304C female JIC swivel nut with the threads of the male JIC fitting.
Hand-tighten the swivel nut onto the male fitting until the cap's internal sealing surface makes firm contact with the male flare cone.
Use an appropriately sized wrench to tighten the swivel nut to the recommended torque for the specific JIC size. Proper torque is crucial to achieve a secure, leak-proof seal without over-tightening, which could damage the fitting or the cap.
The swivel nut design allows for easy installation and tightening without needing to rotate the entire cap body, which is beneficial in confined spaces.

Why Choose Delphi Fittings Part 304C?

Effective Sealing Solution: Provides a reliable and leak-proof method for sealing male JIC 37° flare fittings and ports.
Convenient Swivel Design: The integrated female JIC swivel nut allows for easy installation without twisting the cap body, ideal for accessibility in tight spaces.
System Protection: Essential for preventing contamination and fluid loss from open JIC ports during maintenance or when ports are not in use.
Durable Material: Manufactured from high-grade carbon steel, ensuring strength and longevity in demanding hydraulic environments.
Corrosion Resistant: Standard zinc plating provides enhanced durability and protection against environmental factors.
Standard Compliance: Meets SAE J514 / ISO 8434-2 specifications for JIC components, ensuring proper fit and performance.
Quality Manufacturing: Produced under Delphi Fittings' stringent ISO 9001:2015 certified quality management system.

Get a Quote for Part 304C - 37° JIC Female Tube Cap

For reliably sealing male JIC 37° flare fittings and protecting your hydraulic systems, the Part 304C Female Tube Cap offers a secure, durable, and easy-to-use solution. Contact Delphi Fittings today for wholesale pricing, bulk order information, and expert assistance with your hydraulic component needs.

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