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Product Name | Sanheng Hydraulic 6502 MJ-FJS / 2J4 JIC 74° Cone Male FemaleThread Adapter |
Code | 2J4 |
Material & Surface Treatment | Carbon steel (zinc plated Cr3+); Stainless steel (passivation) |
Application | Pipe connection（oil,water,gas） |
Technology | CNC machining & Forged |
Package | All adapters equipped with thread protective end caps, inside plastic bags, and then inside standard blank carton boxes. |
Our main products | Threaded hydraulic hose fittings and pipe adapters, sucn as Metric , BSP, BSPT, NPT , JIC , ORFS, SAE thread. |
The 2J4 / 6502 straight adapter is purpose-built for seamless gender transition within JIC standard hydraulic systems, eliminating the need for stacked male-to-male and female-to-female connector assemblies that create extra leak points and waste valuable installation space. Manufactured via 1200-ton closed-die forging with precision cold-rolled threads, it features a perfectly concentric 74° flare cone that creates a self-energizing metal-to-metal seal—tightening proportionally as system pressure increases to deliver permanent leak-free performance. The solid forged body absorbs continuous mechanical vibration and sudden pressure spikes, while the precision-machined hexagonal head provides a secure wrench grip for high-torque installation without stripping. Suitable for conveying hydraulic oil, industrial water and compressed gases, it drastically reduces maintenance intervals and extends the service life of critical fluid power systems.
Manufactured in strict compliance with SAE J514 and ISO 8434-2 international standards, all thread pitches and 74° cone angle tolerances are held to ±0.05mm. Carbon steel variants pass 96-hour neutral salt spray testing without red rust, while stainless steel versions withstand over 500 hours of salt spray exposure. Full size range covers 1/4" to 2" with rated working pressures from 16 to 40 MPa. Complete dimensional drawings and material certification reports are available upon request, and all adapters are 100% interchangeable with equivalent products from global mainstream brands.
Self-Energizing 74° Flare Seal: The precision-machined cone creates a metal-to-metal seal that tightens with increasing system pressure, eliminating O-ring degradation and long-term leakage risks in high-temperature applications.
Anti-Galling Cold-Rolled Threads: Cold-formed threads deliver 30% higher fatigue strength than cut threads, with a mirror-smooth surface that prevents galling during repeated assembly and disassembly.
Compact In-Line Design: Integrates male and female JIC connections into a single unit, cutting potential leak points in half while reducing overall assembly length by 40% compared to stacked separate adapters.
Vibration-Locking Cone Interface: The tapered cone interface creates inherent friction that prevents joint loosening under continuous machinery vibration, eliminating the need for additional lock washers or thread sealant.
Wide Temperature Range Performance: Operates reliably across -40°C to 200°C, maintaining structural integrity and sealing properties in both arctic outdoor environments and high-temperature engine compartments.
Universal JIC Compatibility: Strictly adheres to global JIC dimensional standards, ensuring perfect mating with any standard JIC hose end, port or adapter from all major manufacturers.
Carbon Steel (RoHS-Compliant Cr3+ Zinc Plated)
Adopts a hexavalent-chromium-free trivalent zinc plating process with uniform coating thickness and excellent adhesion. It provides superior rust and oxidation resistance, with high tensile strength and exceptional cost-effectiveness, making it ideal for general construction, agricultural machinery and indoor industrial applications.
Stainless Steel (Citric Acid Passivation)
Uses high-quality 304/316L stainless steel billets processed through an eco-friendly citric acid passivation treatment, which removes surface free iron and forms a dense, self-healing chromium oxide film. This enhances acid, alkali and salt spray corrosion resistance by 300% compared to untreated steel, perfectly suited for marine engineering, offshore oil & gas and food processing applications.
Mobile Hydraulic Equipment: Standard connection for excavator boom cylinders, loader steering systems and crane hydraulic lines, with excellent vibration resistance for off-road operation.
Agricultural Machinery: Used in high-pressure irrigation systems, combine harvester hydraulic drives and tractor implement connections, withstanding dust, debris and outdoor weather exposure.
Industrial Hydraulic Power Units: Ideal for injection molding machine clamping systems, hydraulic press pipelines and CNC machine tool hydraulic circuits, ensuring stable pressure delivery for precision operations.
Marine Deck Equipment: Stainless steel variant for ship winches, anchor windlasses and davit hydraulic systems, providing reliable corrosion resistance in salt spray and humid marine atmospheres.
Pneumatic & Compressed Gas Systems: Suitable for high-pressure compressed air lines and industrial gas distribution systems, with leak-free performance that eliminates gas waste and safety hazards.
The adapter body is formed in a single operation via 1200-ton hot closed-die forging, which aligns the metal grain flow along the load path to increase fatigue resistance by 50% compared to cast components. All threads and the critical 74° cone sealing surface are machined in a single setup on 3-axis CNC lathes, ensuring perfect coaxiality and dimensional consistency across every batch. Each unit undergoes 100% thread go/no-go gauge inspection, hydraulic pressure sealing test and surface finish inspection before delivery to guarantee zero defects.
To assist your procurement team in making an informed decision, we have compiled detailed answers to the most common inquiries regarding our manufacturing capabilities and adapter specifications.
Q: Can these JIC 74° cone adapters be used for high-vibration applications like heavy earth-moving equipment?
A: Absolutely. The metal-to-metal 74-degree flared seating is specifically designed to absorb and withstand severe mechanical vibrations. When properly torqued, the connection remains secure, preventing the loosening and subsequent leakage that often plagues inferior fitting designs in heavy machinery.
Q: How do I choose between the carbon steel and stainless steel material options for my fluid system?
A: Your choice should be dictated by the operating environment. The Cr3+ zinc-plated carbon steel is highly durable and cost-effective for standard indoor industrial or protected outdoor applications. However, if your equipment is exposed to highly corrosive chemicals, marine environments, or extreme weather, the passivated stainless steel provides the necessary oxidation resistance for long-term survival.
Q: What is the procedure and cost for requesting physical samples to test in our own engineering labs?
A: We strongly encourage sample testing to verify our quality. We can dispatch mixed samples for a minimal, reasonable product charge. The shipping freight will be calculated based on your location and billed to your account. This allows your engineers to physically inspect the thread precision and surface finish before committing to a larger order.
Q: If our project requires a specific thread pitch or an unusual geometric bend not listed in the standard catalog, can you manufacture it?
A: Yes, our facility is fully equipped to handle OEM and ODM requests. Backed by our rich experience in hydraulic design, our engineering team can work from your CAD files or physical prototypes to custom-machine adapters that perfectly match your proprietary system requirements.
Q: How does your inventory management impact lead times for both standard and customized orders?
A: We maintain a robust stock of conventional products, allowing us to fulfill small batch shipments almost immediately with no MOQ. For larger bulk orders of standard items, our lead time is reliably around 30 days. Custom-manufactured parts requiring specialized tooling or materials will have a tailored timeline, which our sales team will clearly communicate during the quoting phase.
