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Product Name | Sanheng 1C / 1D Hydraulic 24° METRIC Thread Male DIN2353 Union Fitting |
Code | 1C 1D |
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 1C (light series) and 1D (heavy series) union fittings are professional straight connection components designed for DIN2353 standard metric hydraulic pipeline systems. Adopting 24° cone structure with cutting ferrule and optional ED sealing, it realizes rigid, zero-leakage connection for steel tubing in high-pressure fluid circuits. Made of integral forged blank with multi-axis CNC precision machining, the fitting features dense internal structure, accurate thread profile and stable mechanical performance. It effectively absorbs pipeline vibration, prevents thread loosening and micro-leakage under long-term cyclic load, and is suitable for stable transmission of hydraulic oil, industrial water and compressed gas. Fully compliant with DIN2353 international norms, it simplifies on-site assembly and maintenance, reduces unplanned downtime, and ensures continuous and reliable operation of industrial hydraulic systems.
Manufactured in full compliance with DIN 2353 and ISO 8434-1 international industry standards, all dimensions and thread tolerances are strictly controlled. The product passes 96-hour professional salt spray testing with reliable corrosion resistance. Complete dimensional drawings, thread parameters and pressure rating data can be provided according to customer model requirements, supporting direct replacement and matching of old equipment parts.
DIN2353 Standard Compliance: Strictly manufactured according to international DIN2353 norms, fully interchangeable with standard metric hydraulic tubing fittings, no compatibility risks for system upgrading and maintenance.
Dual Sealing Guarantee: Cutting ferrule bite-type primary seal forms a permanent mechanical lock on the tubing, optional ED end face seal provides secondary leak-proof protection, adapts to high-pressure and temperature fluctuation working conditions.
Excellent Anti-Vibration Performance: 24° cone optimized structure effectively absorbs pipeline vibration and mechanical shock, prevents thread loosening and seal failure during long-term continuous operation.
Anti-Galling & Easy Maintenance: Professional surface treatment reduces thread friction coefficient, ensures smooth engagement during assembly, supports repeated disassembly and reassembly without thread damage.
High-Strength Forged Structure: Integral hot forging optimizes metal grain flow, eliminates internal voids, greatly improves burst pressure resistance and fatigue resistance compared with cast products.
Low Resistance Flow Design: Precision polished internal bore minimizes fluid turbulence and pressure loss, maintains maximum energy transfer efficiency of the hydraulic system.
Carbon Steel (Cr3+ Zinc Plated)
Adopts environmentally friendly trivalent chromium zinc plating process, available in silver and yellow finishes. It has excellent rust and oxidation resistance, high tensile strength and stable mechanical performance, cost-effective for conventional hydraulic systems, engineering machinery and general industrial working conditions.
Stainless Steel (Passivation)
Through rigorous professional passivation treatment, free iron on the surface is removed to form a dense and stable chromium oxide protective layer. It has outstanding acid, alkali and salt spray corrosion resistance, perfectly suitable for petrochemical, marine, food processing and other highly corrosive harsh working environments.
This DIN2353 metric union fitting is widely used in high-pressure hydraulic and fluid pipeline straight connection scenarios in various core industrial fields:
Construction & Engineering Machinery: Hydraulic pipeline connection for excavators, loaders, road rollers and other mobile heavy equipment, adapting to high-vibration field working conditions.
Metallurgical & Heavy Industry: Hydraulic system piping for metallurgical equipment, forging machinery and heavy machine tools, withstanding long-term high-pressure and impact load operation.
Industrial Manufacturing: Pipeline connection for automated production lines, hydraulic stations, compressed air and cooling water circulation systems, ensuring stable and continuous operation of factory equipment.
Petrochemical Industry: Medium transmission pipelines for oil and gas, chemical processing systems, with corrosion-resistant material options to adapt to complex and harsh medium environments.
Marine & Offshore Engineering: Hydraulic and fluid pipeline systems for ship equipment, port cranes and offshore platforms, with high pressure resistance and corrosion resistance to adapt to marine working conditions.
The fitting body is formed by high-tonnage integral hot forging to optimize the internal metal grain structure, ensuring a dense and defect-free matrix with excellent impact resistance. The 24° cone sealing surface and metric threads are processed by multi-axis CNC lathes with micron-level precision, ensuring consistent dimensional accuracy and perfect thread profile for each product.
We implement a full-process quality control system in strict accordance with ISO 9001 certification standards: incoming raw materials undergo full chemical composition and mechanical property testing; online dimensional inspection is carried out during production; finished products are subject to random sampling tests including static pressure resistance, burst pressure and vibration fatigue tests. Each unit is also fully inspected for surface quality and thread accuracy to ensure zero defects before delivery.
To assist in your procurement evaluation, we have compiled detailed answers to the most critical technical and operational questions regarding our hydraulic fittings.
A: We employ a combination of high-density forging followed by precision CNC machining. The forging process aligns the metal grain for superior strength, while our multi-axis CNC lathes cut the metric threads and 24° cones to exacting tolerances, ensuring a perfect, leak-free bite when assembled.
A: Our carbon steel fittings feature an advanced Trivalent Chromium (Cr3+) zinc plating (available in silver or yellow), which provides excellent resistance to oxidation and is environmentally compliant. For extreme environments, our passivated stainless steel options offer a deeply resilient barrier against harsh chemicals and saline exposure.
A: Absolutely. We offer comprehensive OEM/ODM services, including high-precision laser marking. We can etch your company logo, custom part numbers, or specific pressure ratings directly onto the hex body of the fittings to support your brand identity.
A: We highly encourage sample testing. We can provide a mixed batch of sample fittings for a nominal, reasonable charge (with freight on your account). This allows your engineering and quality assurance teams to physically verify the thread engagement, material finish, and pressure tolerances firsthand.
A: We maintain a robust inventory of conventional standard fittings, which allows us to ship immediately with no Minimum Order Quantity (MOQ). For bulk orders of standard parts, the lead time is approximately 30 days. Custom engineered products or mixed-part assemblies will require a tailored timeline, which our project managers will clearly define during the quotation phase.
