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Product Name | Sanheng Forged Hydraulic 5404 MP-MP / 1N NPT Male Thread Pipe Nipple |
Code | 1N |
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 1N / 5404 series double male NPT pipe nipple is purpose-built to eliminate the most common failure points of standard cast pipe connectors in North American hydraulic and fluid systems. Unlike porous cast alternatives that develop hidden leaks or burst under sudden pressure spikes, this nipple is manufactured via one-piece closed-die forging to create a dense, void-free internal structure. The precision cold-rolled NPT tapered threads deliver a smooth, grit-free engagement that forms a cold-welded metal-to-metal dry seal when torqued to specification, eliminating the risk of sealant contamination in sensitive hydraulic circuits. With professional anti-corrosion surface treatments, it withstands harsh offshore salt spray, abrasive construction site conditions and continuous machinery vibration. Suitable for conveying hydraulic oil, industrial water, compressed gases and chemical media, it drastically reduces unplanned downtime and provides a reliable, long-lasting connection for critical fluid infrastructure.
Manufactured in full compliance with SAE J514, SAE J476 and ASME B1.20.1 international standards, all NPT taper angles and thread tolerances are strictly controlled. Carbon steel variants pass 96-hour neutral salt spray testing without red rust, while 316L stainless steel versions withstand over 500 hours of salt spray exposure. Full size range covers 1/8" to 4" with close, standard and extended length options up to 6". Complete dimensional drawings and material certification reports are available upon request, and all nipples are 100% interchangeable with standard 5404 series fittings from global mainstream brands.
Precision Dry Seal Taper: Exact 1.7898° per side NPT taper creates a cold-welded metal-to-metal seal, minimizing sealant dependency and eliminating elastomer degradation risks in high-temperature applications.
Void-Free Forged Construction: 100% forged structure eliminates internal porosity and voids, delivering 2-3x higher burst strength than cast alternatives to prevent catastrophic failure under pressure spikes.
Anti-Galling Cold-Rolled Threads: Cold-formed threads have 30% higher fatigue strength than cut threads, preventing galling and thread stripping during repeated assembly and disassembly.
Comprehensive Length Range: Available in close, standard and custom extended lengths up to 6 inches, eliminating the need for stacked adapters to meet spacing requirements.
Superior Vibration Resistance: Dense forged body absorbs continuous machinery vibration, preventing thread loosening in high-cycle hydraulic and pneumatic applications.
Multi-Material Configuration: Offers carbon steel, 316L stainless steel and optional anti-spark brass to match diverse environmental, media and safety requirements.
Carbon Steel (RoHS-Compliant Cr3+ Zinc Plated)
Adopts a hexavalent-chromium-free trivalent zinc plating process with uniform coating adhesion, providing excellent rust and oxidation resistance. It offers exceptional tensile strength and cost-effectiveness, making it ideal for general construction, agricultural machinery and indoor industrial hydraulic systems.
316L Stainless Steel (Chemical Passivation)
Uses low-carbon 316L stainless steel billets processed through rigorous passivation treatment, forming a dense, self-healing chromium oxide film. It provides superior resistance to acids, alkalis and salt spray corrosion, perfectly suited for offshore oil & gas, chemical processing and food-grade applications.
Brass (Optional)
Customizable lead-free brass material with excellent electrical conductivity and anti-spark properties, ideal for hazardous explosive environments, natural gas distribution systems and electrical grounding applications.
North American Heavy Equipment: Standard connection for US-made excavators, loaders, tractors and construction machinery that universally use NPT thread standards.
High-Pressure Pneumatic Systems: Ideal for compressed air lines, industrial gas distribution and pneumatic control systems, with leak-free dry seal performance that eliminates gas waste.
Chemical Processing Plants: 316L stainless steel variant for corrosive chemical transfer lines and process piping, compliant with industrial safety and hygiene standards.
Offshore Oil & Gas Platforms: Used for wellhead control systems and platform hydraulic lines, withstanding salt spray corrosion and extreme pressure fluctuations in marine environments.
General Industrial Plumbing: Suitable for water, steam and low-pressure fluid lines in factories, commercial buildings and municipal infrastructure projects.
The nipple body is formed in a single operation via 1000-ton hot closed-die forging, which aligns the metal grain flow along the load path to maximize tensile strength and fatigue resistance. All NPT threads are cold-rolled rather than cut, resulting in a smoother surface finish and higher thread strength. Each unit undergoes 100% thread go/no-go gauge inspection, hydrostatic pressure testing at 1.5 times the rated working pressure, and surface finish inspection before delivery to guarantee zero defects.
To assist you in your procurement process, we have compiled answers to the most common inquiries regarding our manufacturing capabilities and product specifications.
Yes, our company specializes in the direct manufacture of high-quality hose connectors, instrument fitting connectors, transition joints, and related fluid power components.
Normally, for bulk orders, the lead time is approximately 30 days. Orders involving multiple parts or custom-engineered products will require additional time. However, conventional products are generally kept in stock, allowing us to completely fulfill small batch shipments rapidly.
If the requested item is in stock, we do not set an MOQ. If the products are out of stock or require specific customization (such as unique dimensions or custom laser marking), an MOQ will be established based on the production requirements. Please contact us for detailed specifications.
Absolutely. We fully support custom branding initiatives and can provide precise laser marking services to engrave your logo or part numbers directly onto the fittings.
We welcome sample orders so you can rigorously test and verify our quality firsthand. We can send you samples with a minimal and reasonable charge, with the freight costs placed on your account. Mixed sample batches are also acceptable for comprehensive evaluation.
Yes, we are a professional manufacturer of hydraulic pipe fittings with rich, hands-on experience in the design and manufacture of specialized hydraulic products tailored to unique operational parameters.
