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Home Plumbing Rough Plumbing Supplies Pipe Fittings Black Pipe Fittings Black Reducing Couplings 521-365HN 1-1/4IN X 1/2IN BLACK REDUCING COUPLING

521-365HN 1-1/4IN X 1/2IN BLACK REDUCING COUPLING

PART 683656
SUPPLIER B & K LLC
SUPPLIER PART # 521-365HN
RANK C
SHELF PACK 5
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About this item

The B&K 521-365HN is a 1-1/4-inch x 1/2-inch black iron reducing coupling, engineered to connect two male-threaded pipes of different diameters in non-potable fluid and gas systems. As part of the ProLine Series, this coupling is built from 150-lb class malleable iron, offering exceptional strength, durability, and a secure seal in demanding industrial and mechanical applications.

This reducing coupling features female iron pipe (FIP) threaded ends that comply with ANSI/ASME B1.20.1 standards, ensuring compatibility with standard pipe threads. The black finish provides corrosion resistance in non-potable systems, while the malleable iron body allows for a tight seal due to its relative softness.

Rated for up to 500 PSI at 150°F, this coupling is ideal for use in systems transporting lubricants, oils, greases, LP gases, natural gases (e.g., nitrogen, oxygen), steam, and diesel. It is not intended for potable water applications.

Key Features:

  • Material: 150-lb class malleable black iron for industrial-grade strength
  • Finish: Black coating for corrosion resistance in non-potable systems
  • Connection Type: 1-1/4" FIP x 1/2" FIP threaded ends
  • Design: Reducing coupling for connecting pipes of different diameters
  • Seal Integrity: Malleable iron provides a tight, secure seal due to its relative softness
  • Thread Standard: ANSI/ASME B1.20.1 compliant
  • Pressure Rating: Up to 500 PSI at 150°F
  • Compliance: Meets ASTM and ASME standards
  • Use Environment: Suitable for indoor and outdoor applications

Applications:

  • Fuel Systems: Ideal for LP gas and natural gas distribution
  • Industrial Piping: Used in systems transporting lubricants, oils, greases, and diesel
  • Steam Lines: Compatible with low-pressure steam applications
  • Compressed Air Systems: Provides reliable connections in pneumatic systems
  • DIY & Fabrication Projects: Great for custom pipe furniture, shelving, and structural builds

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Brand B&K
Color Black
Nominal Size 1 1-1/4 in
Nominal Size 2 1/2 in
Material Steel
Finish Black
Connection Type Female Threaded
Thread Type NPT
Fitting Type Reducing Coupling
Application Water, Gas, Oil, and Air Lines
Standards ASTM A53, ANSI B1.20.1
Brand Name Southland
Series 521
Weight (lb.) 0.45
UPC Code 032888407008
Shelf Pack 5
Minimum Order Qty 1
Supplier Name B & K LLC
Supplier Short Name B & K /Mue
Supplier Address 1 2600 Elm Hurst Road
Supplier City Elk Grove Villa
Supplier State IL
Supplier Zip 60007
Country US
Supplier Email brett.merrick@colemanrussell.com
Supplier Url www.muellerindustries.com
Buyer Name Michael Heck
Supplier Phone (800) 782-2385
Supplier Fax (800) 421-7724
Our Customer Id 48813001
Return Policy Return to Wallace
Product Lines Valves, Faucets, Pipe Fittings
Rep Name Brett Merrick
Rep Address Rose Maria Lighthal l@ Factory
Rep Phone (800) 777-0270
Rep Cell (931) 510-7989
Rep Fax (205) 836-6528
Rep Email brett.merrick@colemanrussell.com
Rep Agency Coleman-Russell