Midland Industries

Midland Bronze Cored Square Head Plug

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  • Midland Bronze Cored Square Head Plug Fitting
  • Midland Industries
$5.58 - $99.93

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Description

Midland Bronze Cored Square Head Plug

Midland Bronze Cored Square Head Plugs provide a durable threaded closure for sealing compatible female NPT pipe openings in plumbing, commercial, HVAC, and industrial piping systems.

Manufactured from forged bronze, these plugs feature a cored body to reduce weight, a square head for positive wrench engagement, and precision-machined male NPT threads for dependable installation in compatible water, air, oil, and other fluid handling applications.

Product Highlights

  • Forged bronze construction
  • Cored square head plug configuration
  • Male NPT threaded connection
  • Cored body reduces weight while maintaining strength
  • Square head provides positive wrench engagement
  • Precision-machined NPT threads
  • Excellent corrosion resistance
  • Designed to close compatible female-threaded pipe openings
  • Suitable for plumbing, HVAC, commercial, and industrial systems
  • Available in multiple nominal pipe sizes
  • Manufactured by Midland Industries

Technical Specifications

Product Type Cored Square Head Pipe Plug
Brand Midland
Material Forged Bronze
Connection Type Male NPT
Thread Type NPT
Head Style Square Head
Body Style Cored
Primary Function Closing and Sealing Compatible Female-Threaded Pipe Openings
Media Compatibility Water, Air, Oil, and Other Compatible Media
Available Sizes Multiple Nominal Pipe Sizes

Plug Configuration

Male NPT Threads

The plug features precision-machined male NPT threads for installation into a compatible female-threaded pipe, fitting, valve, manifold, or equipment connection.

Cored Bronze Body

The cored construction reduces material weight while maintaining dependable strength and a durable threaded closure.

Square Head

The square head provides flat wrenching surfaces for controlled tightening and convenient removal during maintenance or system modifications.

Construction Details

Midland Bronze Cored Square Head Plugs are manufactured from durable forged bronze to provide dependable mechanical strength, corrosion resistance, and long service life in demanding piping environments.

The cored body helps reduce overall fitting weight while preserving the strength needed for compatible threaded closure applications.

Precision-machined male NPT threads help provide consistent engagement with compatible female-threaded components when installed using accepted piping practices.

Why Choose a Cored Square Head Plug?

Secure Pipe Closure

  • Closes unused female-threaded openings
  • Useful for pipe, fittings, valves, and equipment ports
  • Compact one-piece construction
  • Suitable for new installations and repairs
  • Available in multiple nominal pipe sizes

Square Wrenching Head

  • Provides positive wrench engagement
  • Simplifies installation and removal
  • Helps keep tools away from the threaded section
  • Supports controlled tightening
  • Convenient for maintenance applications

Cored Construction

Reduced Weight

The cored internal design uses less material than a fully solid plug, helping reduce fitting weight while maintaining a practical threaded closure.

Bronze Durability

Forged bronze provides dependable mechanical performance and excellent corrosion resistance in compatible plumbing and industrial applications.

NPT Threaded Connection

Male NPT

The male NPT connection installs into a compatible female NPT opening of the matching nominal pipe size.

Thread Sealing

Use PTFE tape or an approved pipe-thread sealant on the male NPT threads according to the system media, pressure, temperature, and installation requirements.

Typical Applications

Plumbing & HVAC

  • Closing unused pipe openings
  • Valve and fitting ports
  • HVAC piping systems
  • Plumbing maintenance
  • System modifications and repairs

Commercial & Industrial

  • Industrial piping systems
  • Compatible water systems
  • Air and oil piping
  • Equipment connections
  • General fluid handling systems

Size Selection

Midland Bronze Cored Square Head Plugs are available in multiple nominal pipe sizes.

Confirm the required pipe size and verify that the mating opening uses compatible female NPT threads before ordering.

Willy knows his pipe fittings
Ask Willy: Need Help Selecting a Bronze Cored Square Head Plug?

Our pipe and fitting specialists can help review your nominal pipe size, female NPT mating connection, system media, pressure, temperature, and material compatibility before you order.

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Frequently Asked Questions

What is a cored square head plug used for?

It is used to close and seal a compatible female-threaded pipe, fitting, valve, manifold, or equipment opening.

What material is this plug made from?

It is manufactured from forged bronze.

What type of connection does it use?

It uses a male NPT threaded connection.

What does cored construction mean?

Cored construction removes material from portions of the internal body to reduce weight compared with a fully solid plug.

Why does the plug have a square head?

The square head provides flat wrenching surfaces for controlled tightening and removal.

Why choose bronze?

Bronze provides dependable mechanical strength and excellent corrosion resistance in compatible piping applications.

Should thread sealant be used?

Use PTFE tape or an approved pipe-thread sealant on the male NPT threads according to the application requirements.

What media can this plug be used with?

The supplied product information identifies water, air, oil, and other compatible fluids.

Are multiple sizes available?

Yes. The supplied product information identifies multiple nominal pipe sizes.

What should I verify before ordering?

Confirm nominal pipe size, female NPT thread compatibility, pressure, temperature, system media, and installation requirements.

Important Ordering & Installation Notes

  • This listing is for Midland Bronze Cored Square Head Plugs.
  • The plug uses a male NPT threaded connection.
  • Verify the required nominal pipe size before ordering.
  • Confirm the mating opening uses compatible female NPT threads.
  • The fitting features cored construction and a square wrenching head.
  • Use the square head for wrench engagement during installation and removal.
  • Avoid gripping or damaging the threaded portion with installation tools.
  • Use PTFE tape or an appropriate thread sealant on the NPT connection.
  • Verify bronze is compatible with the intended system media.
  • Confirm system pressure and temperature requirements before installation.
  • Inspect the threads for damage or contamination before assembly.
  • Avoid excessive tightening that could damage the plug or mating threads.
  • Check the completed connection for leakage when used in a fluid-carrying system.
  • Pipe, fittings, valves, and additional components are sold separately unless otherwise specified.
  • Install according to applicable piping requirements and Midland manufacturer recommendations.
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