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Home Plumbing Rough Plumbing Supplies Pipe Fittings Black Pipe Fittings Black Merchant Couplings 521-220HC 1/8IN BLACK MERCHANT COUPLING

521-220HC 1/8IN BLACK MERCHANT COUPLING

PART 862500
SUPPLIER B & K LLC
SUPPLIER PART # 521-220HC
RANK D
SHELF PACK 30
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About this item

The B&K 521-220HC is a precision-engineered black iron merchant coupling designed to provide a secure and durable connection between two pipes of matching diameter. With its compact 1/8-inch Female Iron Pipe (FIP) connections on both ends, this coupling is ideal for tight installations and small-diameter piping systems in residential, commercial, and industrial applications.

Constructed from high-quality malleable iron and finished with a black coating, the coupling offers excellent corrosion resistance and long-term durability. Its threaded ends conform to ANSI/ASME B1.20.1 standards, ensuring a tight, leak-resistant seal when paired with compatible black iron fittings. The relative softness of the malleable iron enhances sealing performance, making it a reliable choice for high-pressure systems.

Rated for up to 500 PSI at 150°F, the 521-220HC meets ASTM and ASME standards and is suitable for transporting a wide range of non-potable fluids. Whether used in fluid transport systems or custom DIY projects, this merchant coupling delivers consistent performance and rugged dependability.

Key Features

  • Size: 1/8 inch inlet and outlet diameter
  • Connection Type: Female Iron Pipe (FIP) on both ends
  • Material: Malleable iron
  • Finish: Black coating for corrosion resistance
  • Product Type: Merchant Coupling
  • Threading: ANSI/ASME B1.20.1 compliant
  • Pressure Ratings:
    • Working Pressure: 300 PSI
    • Maximum Pressure: 500 PSI at 150°F
  • Temperature Range:
    • Minimum: -20°F
    • Working: 77°F
    • Maximum: 224°F
  • Dimensions:
    • Length: 0.75 in
    • Height: 0.56 in
    • Width: 0.56 in
    • Weight: 0.028 lbs
  • Class: 150-lb malleable fittings
  • Compliance: Meets ASTM and ASME standards
  • Warranty: 1-year limited warranty
  • Brand: Southland
  • Unit of Measure: Each

Applications

  • Securely connecting two pipes of matching diameter
  • Transport of:
    • Lubricants
    • Oils
    • Grease
    • Liquefied petroleum (LP) gases
    • Natural gases (e.g., nitrogen, oxygen)
    • Steam
    • Diesel
  • Industrial and commercial fluid systems
  • Custom DIY plumbing and mechanical projects

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Diameter 1/8 Inch
Brand LDR Malleables
Color Black
Size 1/8"
Material Malleable Black Iron
Connection Type FIP x FIP
Shape Coupling
Product Length (in) 0.75
Product Width (in) 0.56
Product Height (in) 0.56
Product Weight (lbs) 0.028
Working Pressure (PSI) 300
Maximum Pressure (PSI) 500
Minimum Temperature (°F) -20
Working Temperature (°F) 77
Maximum Temperature (°F) 224
Finish Plain
Thread Type ANSI/ASME B1.20.1
Pressure Class 150 lb
Certifications ASTM A53, ASME B1.20.1
Warranty 1-year limited warranty
Applications Lubricant, oil, grease, LP gases, fuel, DIY projects, nitrogen, oxygen, steam, diesel
UPC Code 032888364912
Shelf Pack 30
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