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Home Plumbing Rough Plumbing Supplies Pipe Fittings Black Pipe Fittings Black Plugs 521-804HN 3/4IN BLACK SQUARE HEAD PLUG

521-804HN 3/4IN BLACK SQUARE HEAD PLUG

PART 643610
SUPPLIER B & K LLC
SUPPLIER PART # 521-804HN
RANK A
SHELF PACK 20
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About this item

The B&K Products 521-804HN is a 3/4-inch Male Iron Pipe (MIP) Black Iron Plug designed to seal off female threaded fittings or pipes. This square head plug is part of the 150-lb class malleable fittings series and is engineered for high-pressure applications in industrial and residential systems.

Key Features:

  • Type: Square Head Plug
  • Material: Black Malleable Iron
  • Connection Type: MIP (Male Iron Pipe)
  • Size: 3/4 inch
  • Dimensions: 1.10" L x 1.14" H x 1.10" W
  • Weight: 0.1310 lbs
  • Working Pressure: 232 PSI
  • Maximum Pressure: 300 PSI
  • Temperature Range: -20°F to 347°F
  • Working Temperature: 77°F
  • Thread Standard: ANSI/ASME B1.20.1
  • Compliance: Meets ASTM and ASME standards
  • Warranty: 1-year limited warranty
  • Seal Quality: Relative softness of metal ensures a secure seal

Applications:

  • Lubricant systems
  • Oil and grease transport
  • Liquefied petroleum (LP) gases
  • Fuel systems
  • Natural gases (e.g., nitrogen, oxygen)
  • Steam and diesel systems

⚠️ Note: This fitting is not designed for potable water applications.

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Brand LDR Malleables
Color Black
Length 3 Inch
Model 521-804HN
Product Name 3/4-in MIP Black Iron Plug
Type Square Head Plug
Material Black Malleable Iron
Connection Type MIP (Male Iron Pipe)
Size 3/4 inch
Product Length (in) 1.1
Product Height (in) 1.14
Product Width (in) 1.1
Product Weight (lbs) 0.131
Working Pressure (PSI) 232
Maximum Pressure (PSI) 300
Temperature Range (°F) -20 to 347
Working Temperature (°F) 77
Thread Standard ANSI/ASME B1.20.1
Compliance Meets ASTM and ASME standards
Warranty 1-year limited warranty
Applications Lubricant, oil, grease, LP gases, fuel, nitrogen, oxygen, steam, diesel
Potable Water Use Not designed for potable water applications
Seal Quality Relative softness of metal helps provide a sure seal
UPC Code 032888406827
Shelf Pack 20
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