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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
Nominal Size 3/4 in
Color Black
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