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Description
304C14 (often formatted as 304-C-14 or 0304-C-14) is the standard industry part number for a #14 Female JIC (SAE 37° Flare) Hydraulic Cap Nut.
It is designed to cap off, protect, and seal open male JIC hydraulic lines or port adapters from 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.
- 14 (Size): Indicates the hydraulic dash size in 16ths of an inch (
14/16″):- Tube Outer Diameter (O.D.): 7/8-inch.
- Thread Size: 1-3/16-12 UN/UNF straight threads.
- Hex Nut Size: Typically requires a 1-3/8-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 5,000 PSI.
- 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-14, Parker 14 FNTX-S, Gates 14FJ-CAP, and Aeroquip 210292-14S.
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