Description

Description

Midland Aluminum Square Head Plugs

Midland Aluminum Square Head Plugs provide a lightweight, corrosion-resistant solution for sealing compatible female threaded pipe openings in industrial, pneumatic, utility, and general-purpose piping systems.

Manufactured from durable aluminum, these plugs feature precision-machined male NPT threads and an integral square wrenching head for secure installation and straightforward removal. Multiple nominal pipe sizes are available to match a variety of threaded piping applications.

Product Highlights

Square head threaded pipe plug
Lightweight aluminum construction
Male NPT threaded connection
Square head for positive wrench engagement
Precision-machined NPT threads
Corrosion-resistant aluminum material
Available in multiple nominal pipe sizes
Designed to seal compatible female threaded openings
Suitable for industrial, pneumatic, compressed air, and utility piping systems
Manufactured by Midland Industries

Technical Specifications

Product Type	Square Head Pipe Plug
Brand	Midland
Material	Aluminum
Connection Type	Male NPT
Thread Type	NPT
Head Style	Square Head
Available Sizes	Multiple Nominal Pipe Sizes
Primary Function	Sealing Compatible Female Threaded Pipe Openings
Typical Applications	Industrial, Pneumatic, Compressed Air, Utility, Mechanical, and General-Purpose Piping Systems

Plug Configuration

Male NPT Thread

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

Aluminum Body

The lightweight aluminum construction provides dependable corrosion resistance while helping reduce overall system weight.

Square Wrenching Head

The integral square head provides a positive gripping surface for installation, tightening, inspection, and removal with an appropriate wrench.

Construction Details

Midland Aluminum Square Head Plugs are manufactured from durable aluminum to provide reliable performance while minimizing overall system weight.

Precision-machined male NPT threads provide consistent engagement with compatible female threaded fittings and pipe openings.

The integral square head offers positive wrench contact, making installation and removal straightforward during initial assembly, maintenance, or system modifications.

Why Choose an Aluminum Square Head Plug?

Lightweight Construction

Lower weight than many steel alternatives
Easy handling during installation
Corrosion-resistant aluminum material
Useful in weight-sensitive piping assemblies
Suitable for compatible industrial environments

Service-Friendly Design

Square head provides positive wrench engagement
Easy to install and remove
Creates a removable threaded closure
Useful for inspection and maintenance access
Available in multiple nominal sizes

NPT Threaded Connection

Male NPT

Each plug uses a male NPT thread designed to install into a compatible female NPT opening of the corresponding nominal pipe size.

Thread Sealing

Use an approved thread sealant or PTFE tape where required by the application to help provide a secure, leak-resistant threaded connection.

Typical Applications

Pneumatic & Utility

Compressed air systems
Pneumatic piping
Utility piping
Equipment ports
Temporary or permanent threaded closures

Industrial & General Service

Industrial piping systems
Mechanical equipment
Manifold openings
Maintenance and repair
Compatible general-purpose piping applications

Size Selection

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

Confirm the required nominal pipe size and verify that the mating component uses a compatible female NPT thread before ordering.

Ask Willy: Need Help Selecting an Aluminum Square Head Plug?

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

Email the GetPipe.com Team Visit Quick Support

Frequently Asked Questions

What material are these plugs made from?

The plugs are manufactured from aluminum.

What type of connection do they use?

They use male NPT threaded connections.

What is a square head plug used for?

A square head plug is used to seal a compatible female threaded pipe, fitting, valve, manifold, or equipment opening.

Why does the plug have a square head?

The square head provides a positive wrenching surface for controlled installation and removal.

Are multiple sizes available?

Yes. Midland Aluminum Square Head Plugs are available in multiple nominal pipe sizes.

Why choose aluminum?

Aluminum provides a lightweight, corrosion-resistant option for compatible threaded piping applications.

Should thread sealant be used?

Use an approved thread sealant or PTFE tape where required by the specific application.

Can the plug be removed later?

Yes. The threaded square head design allows the plug to be removed for maintenance, inspection, or future system modifications.

What applications are these plugs suited for?

Typical uses include industrial piping, pneumatic systems, compressed air, utility piping, equipment ports, and other compatible general-purpose applications.

What should I verify before ordering?

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

Important Ordering & Installation Notes

This listing is for Midland Aluminum Square Head Plugs.
Available in multiple nominal pipe sizes.
Each plug uses a male NPT threaded connection.
Verify the mating opening uses a compatible female NPT thread.
Use an approved thread sealant or PTFE tape where required.
Use the square head as the primary wrenching surface.
Avoid excessive tightening that could damage the plug or mating threads.
Verify aluminum is suitable for the intended media and operating environment.
Confirm pressure and temperature requirements before installation.
Consider galvanic compatibility when aluminum is connected to dissimilar metals.
Inspect mating threads for damage or contamination before assembly.
Support connected equipment or piping as required to prevent excessive mechanical loading.
Check completed connections for leakage before placing the system into service.
Install according to accepted piping practices and applicable requirements.
Follow Midland manufacturer recommendations for complete installation and operating requirements.