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Home Plumbing Rough Plumbing Supplies Pipe Fittings Black Pipe Fittings Black Plugs 521-802HN 3/8IN BLACK SQUARE HEAD PLUG

521-802HN 3/8IN BLACK SQUARE HEAD PLUG

PART 643599
SUPPLIER B & K LLC
SUPPLIER PART # 521-802HN
RANK A
SHELF PACK 10
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About this item

The B&K Products 521-802HN is a 3/8-inch Male Iron Pipe (MIP) Black Iron Plug designed to securely seal off female threaded pipe ends. This square head plug is part of the 150-lb class malleable iron fittings line, offering durability and reliability for high-pressure systems.

Key Features:

  • Type: Square Head Plug
  • Material: Black Iron
  • Connection Type: MIP (Male Iron Pipe)
  • Size: 3/8 inch
  • Pressure Rating: Up to 500 PSI
  • Temperature Rating: Up to 150°F
  • Thread Standard: ANSI/ASME B1.20.1
  • Class: 150-lb malleable fittings
  • Seal Quality: Relative softness of metal helps provide a sure seal
  • Compliance: Meets ASTM and ASME standards

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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Nominal Size 3/8 in
Brand LDR Malleables
Color Black
Model 521-802HN
Product Name 3/8-in MIP Black Iron Plug
Type Square Head Plug
Material Black Iron
Connection Type MIP (Male Iron Pipe)
Size 3/8 inch
Pressure Rating 500 PSI
Temperature Rating 150°F
Class 150-lb class malleable fittings
Thread Standard ANSI/ASME B1.20.1
Compliance Meets ASTM and ASME standards
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 032888309623
Shelf Pack 10
Minimum Order Qty 1