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The Sanheng 6C / 6D DIN Bulkhead Metric Thread Male Union Fitting serves as a critical component for establishing secure, through-panel hydraulic pipeline connections across demanding industrial environments. Engineered with a precision metric thread and an advanced bite-type tube fitting mechanism, this component ensures optimal fluid routing for oil, water, and gas systems. Strictly adhering to DIN 2353 and ISO 8434-1 standards with a 24° cone design, these fittings guarantee direct interchangeability with major global hydraulic brands. Manufactured utilizing full-CNC precision machining, every unit meets ISO 18413 cleanliness standards, effectively preventing particulate contamination within sensitive hydraulic circuits.
The product line encompasses both the 6C light series and the 6D heavy series, accommodating diverse system pressure requirements. Procurement specialists can source these bulkheads as individual standalone fittings or request complete, ready-to-install kits equipped with lock nuts, bite rings, and union nuts, providing maximum flexibility for complex assembly lines. It is commonly used for through-panel hydraulic pipe connections in industrial equipment, offering a tangible sense of security through its heavy, solid metallic construction and precise thread engagement.
Product Name | Sanheng 6C / 6D Hydraulic DIN Bulkhead METRIC Thread Male Union Fitting |
Code | 6C 6D |
Material & Surface Treatment | Carbon steel (zinc plated Cr3+); Stainless steel (passivation) |
Application | Pipe connection（oil,water,gas） |
Technology | CNC machining |
Package | All adapters equipped with thread protective end caps, inside plastic bags, and then inside standard blank carton boxes. |
Custom Service | OEM & ODM available |
Part No. | Metric Thread | Tube O.D. (mm) | Pressure Rating (MPa) | Series Type |
6C-12 | M12×1.5 | 6 | 31.5 | Light (L) |
6C-30 | M30×2 | 22 | 16 | Light (L) |
6C-52 | M52×2 | 42 | 16 | Light (L) |
6D-14 | M14×1.5 | 6 | 63 | Heavy (S) |
6D-30 | M30×2 | 20 | 40 | Heavy (S) |
6D-52 | M52×2 | 38 | 31.5 | Heavy (S) |
Designed strictly according to the DIN hydraulic fitting structure (specifically DIN 2353 and ISO 8434-1 protocols), this component is perfectly suitable for standardized metric tube connections. The precision 24° cone design ensures flawless compatibility and direct interchangeability with globally recognized hydraulic components, allowing procurement teams to integrate these parts without altering existing pipeline architectures.
Two distinct structural series are available to accommodate varying operational stresses:
6C series – Engineered as the light type for reliable fluid transfer in standard industrial applications requiring consistent performance under moderate stress.
6D series – Constructed as the heavy type, featuring a reinforced wall thickness capable of withstanding extreme mechanical forces and maintaining a secure seal under maximum pressure ratings up to 63 MPa.
The optimized bite type structure allows an exceptionally reliable tube connection in complex hydraulic pipeline systems. This precision-engineered mechanism delivers a zero-leak seal even under severe vibration. Furthermore, the high-strength thread profile and durable bite ring support high reusability, allowing maintenance teams to repeatedly disassemble and reassemble the connection, significantly reducing long-term replacement costs.
Specifically designed for through-panel installation, making it highly suitable for cabinet-type machinery and enclosed hydraulic equipment. Carbon steel variants feature a RoHS-compliant, hexavalent chromium-free (Cr3+) zinc plating, offering a smooth, metallic finish that resists oxidation. Stainless steel options undergo rigorous passivation treatments, dramatically extending the component's anti-corrosion lifespan in damp, chemically aggressive, or salt-heavy environments.
The 6C/6D DIN Bulkhead Fitting is widely utilized in highly demanding hydraulic pipe connection (oil, water, gas) scenarios across multiple heavy-duty industries. Its core application fields include:
Engineering machinery (excavators, loaders, cranes): Provides highly secure hydraulic pipeline bulkhead connections that effortlessly absorb the constant mechanical shocks and heavy vibrations typical of earthmoving operations.
Metallurgical equipment (steel rolling, smelting): Essential for closed hydraulic system installations where fittings must endure intense radiant heat and continuous operational cycles without losing sealing integrity.
Industrial hydraulic power units: Ideal for panel-type pipeline layouts, allowing engineers to organize complex fluid routing through centralized control cabinets with clean, accessible connection points.
Mining machinery & automation equipment: Delivers secure high-pressure hydraulic pipeline through-wall connections deep underground, resisting abrasive dust and moisture. It also ensures precision hydraulic circuit assembly in robotic lines, benefiting from the ISO 18413 standard cleanliness that protects sensitive servo valves from microscopic debris.
It is especially suitable for industrial sites with strict requirements for pipeline sealing, pressure resistance and installation space, and can stably work in high-temperature, high-vibration and other harsh working conditions.
The 6C designation refers to the light series, engineered for standard industrial applications where space and weight might be considerations, yet reliable performance is required. In contrast, the 6D represents the heavy series, featuring thicker walls and a reinforced profile designed specifically for higher pressure systems. The 6D series can safely handle extreme pressure ratings up to 63 MPa, making it the preferred choice for heavy-duty machinery and intense hydraulic loads.
It uses a precision-machined metric thread according to the DIN tube fitting structure. This 24° cone metric design complies with international ISO 8434-1 specifications, ensuring that procurement teams can confidently integrate these fittings into existing global hydraulic setups without worrying about thread mismatch or compatibility issues.
It is mainly used for through-panel hydraulic pipeline connections. When fluid lines need to pass safely through a metal partition, machine casing, or control cabinet wall, this bulkhead union provides a secure, leak-proof bridge. Its design allows technicians to lock the fitting firmly against the panel, isolating vibrations and protecting the internal hydraulic circuit from external environmental factors.
Yes, the high-strength metric threads and optimized bite-type ring are designed for excellent reusability. Maintenance personnel can safely disassemble and reassemble the connection multiple times during routine system checks or part replacements. This repeatable sealing capability significantly reduces the ongoing maintenance costs associated with hydraulic pipeline management.
