The B&K Products 521-204HN Black Iron Coupling is a durable and high-performance fitting designed to securely connect two pipes of equal diameter. Constructed from malleable iron with a black finish, this coupling is engineered for industrial-grade applications where strength and reliability are essential. It is not intended for potable water systems but excels in transporting various non-potable fluids.

This coupling is ideal for use in systems that handle lubricants, oils, greases, liquefied petroleum (LP) gases, natural gases (including nitrogen and oxygen), steam, and diesel. Its malleable iron body ensures a tight seal due to the relative softness of the metal, which enhances thread engagement and leak resistance.

Threaded ends conform to ANSI/ASME B1.20.1 standards, ensuring compatibility with standard piping systems. The fitting meets ASTM and ASME standards and is rated for high-pressure applications, performing reliably up to 500 PSI at 150°F.

Key Features & Applications

• Black malleable iron construction for industrial durability.
• 150-lb class malleable fittings for robust performance.
• Rated up to 500 PSI at 150°F, suitable for high-pressure systems.
• Threaded ends comply with ANSI/ASME B1.20.1 standards for secure connections.
• Meets ASTM and ASME standards for quality assurance.
• Ideal for:
  • Lubricant transport
  • Oil and grease systems
  • LP and natural gas lines
  • Steam systems
  • Diesel fuel systems
  • DIY mechanical projects