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Description
304C05 (often formatted as 304-C-05 or 0304-C-05) is the standard industry part number for a #05 Female JIC (SAE 37° Flare) Hydraulic Cap Nut.
It is engineered to shut off, protect, and seal open male JIC hydraulic lines or port adapters from leaks and system contamination. 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 seals tightly against a matching male flare.
- 05 (Size): Indicates the hydraulic dash size in 16ths of an inch (
5/16″):- Tube Outer Diameter (O.D.): 5/16-inch.
- Thread Size: 1/2-20 UNF straight threads.
- Hex Nut Size: Typically requires a 5/8-inch wrench to tighten. Key Performance Features
- High-Pressure Capability: Built to operate safely within high-pressure fluid systems, typically supporting maximum dynamic pressures up to 6,000 PSI.
- Standard Compliance: “The 05 JIC Cap Nut from Brennan Industries Inc is designed to meet SAE J514 specifications ensuring reliability and durability in demanding environments.” -- [hydraulic-supply.com].
- Interchangeability: Directly cross-references with equivalent part numbers across major fluid-power manufacturers, including the Brennan 0304-C-05, Parker 5 FNTX-S, Gates 05FJ-CAP, Aeroquip 210292-5S, and Tompkins 0304-C-05.
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