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Description
304C02 (often formatted as 304-C-02 or 0304-C-02) is the standard industry part number for a #02 Female JIC (SAE 37° Flare) Hydraulic Cap Nut.
It is engineered to plug, protect, and seal open male JIC hydraulic lines or port adapters from high-pressure fluid leaks and environmental debris. The alphanumeric designation breaks down into the following technical specifications:
Model & Spec Breakdown
- 304-C / 0304-C (Series): Identifies the component as a Female JIC Cap. It features internal straight threads and a 37-degree cone seat that compresses against a matching male flare to create a tight mechanical seal.
- 02 (Size): Indicates the hydraulic dash size in 16ths of an inch (
2/16″):- Tube Outer Diameter (O.D.): 1/8-inch.
- Thread Size: 5/16-24 UNF straight threads.
- Hex Nut Size: Typically requires a 7/16-inch wrench to tighten.
Key Performance Features
- High-Pressure Capability: Built to withstand intense workloads within heavy fluid systems, typically supporting dynamic working pressures up to 7,500 to 9,000 PSI depending on the specific manufacturing style (forged vs. straight steel).
- Standard Compliance: Fully compliant with SAE J514 engineering guidelines, ensuring exact fitment and thread alignment across standard industrial, agricultural, and commercial machinery.
- Interchangeability: Directly cross-references with equivalent part numbers across major fluid-power brands, including Brennan 0304-C-02, Parker 2 FNTX-S, Gates 02FJ-CAP, and Aeroquip 210292-2S.
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