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Product Description
The NFPA Compliant NH NST Thread Connectors are precision-engineered couplings designed to ensure secure, leak-free connections in firefighting systems. Compatible with NH (National Hose) and NST (National Standard Thread) fittings, these connectors meet the latest NFPA 1963-2025 standards for safety and performance . Ideal for fire departments, industrial facilities, and emergency responders, they offer reliable connectivity under high-pressure conditions.
The connectors feature NH male threads and NST female threads, ensuring seamless integration with standard fire hoses, hydrants, and nozzles. The threads are machined to ±0.05 mm tolerance for a tight, vibration-resistant fit .
Rated for 2.5 MPa (363 PSI) working pressure and 10 MPa (1,450 PSI) burst pressure, these connectors withstand extreme conditions. The dual O-ring seal design prevents leaks even under dynamic pressure fluctuations .
Constructed from marine-grade brass with a nickel-plated finish, the connectors resist rust and chemical degradation. They are tested to 480 hours of salt spray exposure without corrosion .
The connectors feature a twist-and-lock mechanism for quick, tool-free assembly. A torque indicator ensures proper tightening, reducing the risk of over-tightening or leakage .
These connectors meet NFPA 1963-2025 requirements for thread dimensions, pressure testing, and durability. They also carry UL certification, ensuring compliance with global safety standards .
Fire Hose Systems: Connect hoses to hydrants, pumps, and nozzles in municipal and industrial firefighting networks.
Emergency Response: Used in portable firefighting equipment, such as skid-mounted pumps and deluge systems.
Industrial Water Systems: Suitable for high-pressure washdowns, cooling systems, and process water lines.
Marine and Offshore: Resistant to saltwater corrosion, ideal for shipboard firefighting and offshore platforms.
Q: Are these connectors compatible with both NH and NST threads?
A: Yes, the male NH threads and female NST threads allow cross-compatibility with standard firefighting equipment.
Q: What is the recommended torque for installation?
A: Tighten to 70–90 N·m using a torque wrench to ensure proper sealing without damaging the threads .
Q: Can they be used in freezing temperatures?
A: Yes, the connectors maintain flexibility and seal integrity at temperatures as low as -30°C.
Q: How do I inspect for leaks?
A: Apply a soapy water solution to the connection and pressurize the system. Bubbles indicate leaks, which should be addressed immediately.
