Charman Inc.
150# Galvanized Malleable Iron Square Head Plug
- Availability:
- Usually in Stock – Ships Quickly
- Weight:
- 0.00 LBS
Description
150# Galvanized Malleable Iron Square Head Plug
150# galvanized malleable iron square head plugs close a female-threaded pipe, fitting, valve, manifold, or equipment opening. The male NPT threads install into the opening, while the raised square head provides wrench flats for tightening, removal, inspection, and future system access.
Select the required nominal pipe size from the product options above. The selected variation determines the Charman item number, online selling price, weight, cost, and other size-specific product information.
Product Highlights
- 150# Class galvanized malleable iron construction
- Male NPT threaded connection
- Raised square head for wrench installation and removal
- Closes a female-threaded pipe or fitting opening
- Galvanized finish provides added corrosion resistance
- Removable closure for service, inspection, and maintenance access
- Available in nominal pipe sizes from 1/8" through 6"
- Suitable for commercial, industrial, plumbing, maintenance, and repair applications
Technical Specifications
| Material | Galvanized Malleable Iron |
|---|---|
| Pressure Class | 150# / Class 150 |
| Connection | Male NPT |
| Configuration | Threaded Opening Closure |
| Head Style | Raised Square Head |
| Thread Standard | ASME B1.20.1 |
| Dimensional Standard | ANSI/ASME B16.3 |
| Finish | Galvanized |
| Fitting Type | Threaded Square Head Pipe Plug |
| Manufacturer | Charman Manufacturing |
| Available Sizes | 1/8" through 6" |
How a Square Head Plug Works
The male NPT threads engage a compatible female-threaded opening. The square head allows the plug to be tightened or removed with a suitable wrench, making it useful where a removable closure is needed for maintenance, testing, inspection, or future piping connections.
Common Applications
Plumbing and Mechanical Systems
- Closing unused threaded outlets
- Temporary or permanent fitting closure
- Mechanical-room piping
- Galvanized steel pipe installations
- Water and utility piping
- General repair and maintenance
Industrial and Utility Service
- Industrial process piping
- Compressed-air systems
- Outdoor and damp-location piping
- Oil and petroleum piping
- Equipment and manifold ports
- Approved low-pressure steam service
Product Resources
Review the Charman product catalog, galvanized malleable iron specifications, and manufacturer warranty information before installation.
Need Help Selecting a Galvanized Square Head Plug?
Our industrial PVF specialists can help confirm the required pipe size, pressure class, thread type, service conditions, material compatibility, application requirements, and product availability.
Frequently Asked Questions
What is a galvanized square head plug used for?
A square head plug closes a female-threaded pipe, fitting, valve, manifold, or equipment opening.
Does this plug have male threads?
Yes. The plug has male NPT threads designed to install into a compatible female-threaded opening.
How is a plug different from a cap?
A plug has male threads and installs inside a female-threaded opening. A cap has female threads and fits over a male-threaded pipe end.
Why does it have a square head?
The raised square head provides wrench flats for controlled installation and removal.
What pressure class is this fitting?
This galvanized malleable iron square head plug is manufactured as a 150# or Class 150 threaded fitting.
What sizes are available?
Available product variations range from 1/8" through 6" nominal pipe size.
Does the galvanized finish improve corrosion resistance?
Yes. The galvanized finish provides added corrosion resistance compared with an unfinished black fitting, although suitability still depends on the environment, piping media, temperature, and application.
Can it be used for water, air, oil, gas, or steam?
It may be used in compatible water, compressed-air, oil, gas, steam, and general-service systems when the application remains within applicable pressure, temperature, media, code, and manufacturer requirements.
Should thread sealant be used?
Use an approved pipe-thread sealant or thread tape on the male NPT connection, selected for the piping media, pressure, temperature, applicable codes, and manufacturer recommendations.
Important Ordering Notes
- Select the required nominal pipe size before adding the product to your cart.
- The selected variation determines the Charman item number, price, weight, and cost.
- This plug has one male NPT connection and is designed for a female-threaded opening.
- Confirm the nominal size and thread type of the mating fitting, valve, manifold, or equipment port.
- Use the square head with a properly sized wrench during installation and removal.
- Use an approved thread sealant suitable for the piping media and operating conditions.
- Do not overtighten the plug, as excessive force can damage the threads or fitting.
- Confirm pressure, temperature, media compatibility, corrosion exposure, and application requirements before installation.
- Installation should be completed by qualified personnel and comply with applicable codes and standards.
- Manufacturer warranty coverage is subject to the terms, limitations, and exclusions in the linked warranty document.
