Charman Inc.
316 Stainless Steel 150# Threaded Square Head Solid Plug - SP114
- Availability:
- Usually in Stock – Ships Quickly
- Weight:
- 0.00 LBS
Description
316 Stainless Steel 150# Threaded Square Head Solid Plug - SP114
Charman 316 Stainless Steel SP114 Threaded Square Head Solid Plugs provide a compact closure for compatible female-threaded piping openings. Manufactured from 316 stainless steel, these plugs feature an external square head for wrench engagement during installation and removal.
The SP114 Square Head Solid Plug family is available in ten nominal sizes from 1/8" through 3". These fittings are useful for closing unused threaded openings in plumbing, industrial, process, maintenance, and general piping systems where a removable corrosion-resistant closure is required.
Product Highlights
- SP114 solid plug design
- Square head configuration
- 316 stainless steel construction
- Ten nominal sizes available
- External male threaded connection
- Available in sizes ranging from 1/8" through 3"
- Square head provides wrench engagement for installation and removal
- 316 stainless steel offers enhanced corrosion resistance for suitable service environments
What Is an SP114 Threaded Square Head Solid Plug?
A 316 stainless steel SP114 threaded square head solid plug is a male-threaded fitting used to close a compatible female-threaded piping opening. The solid body blocks the opening while allowing the plug to be removed when access is needed.
The external square head provides flat wrenching surfaces for tightening and removal. This makes the fitting useful where a compact threaded closure is required in compatible piping and equipment connections.
Why Choose a 316 Stainless Steel SP114 Square Head Solid Plug?
316 Stainless Steel Construction
- Durable construction
- Enhanced corrosion resistance
- Designed for threaded piping
- Suitable for compatible piping systems
- Useful across industrial and process applications
Square Head Plug Design
- Solid closure design
- Male threaded connection
- External square wrenching head
- Ten nominal sizes available
- Designed for compatible female-threaded openings
Common Applications
Plumbing & General Piping
- Port closure
- Piping repairs
- Piping modifications
- Unused threaded openings
- General-purpose piping installations
Industrial & Process Use
- Equipment ports
- Maintenance work
- Process piping systems
- Industrial piping closures
- Compatible stainless steel piping installations
Construction Details
316 Stainless Steel Body
- Solid plug construction
- SP114 plug configuration
- Designed for threaded closure
- Suitable for compatible threaded systems
- 316 stainless steel provides enhanced corrosion resistance for suitable applications
Square Head Threaded Design
- External square head
- Single male threaded end
- Solid internal construction
- Designed to close female-threaded openings
- Thread size and wrench access should be confirmed before installation
Available SP114 Square Head Solid Plug Sizes
The 316 Stainless Steel 150# Threaded Square Head Solid Plug - SP114 is available in 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", and 3" nominal sizes. Each size has its own Charman part number for accurate ordering.
The ten-size range allows the same SP114 Square Head Solid Plug family to be selected across several common threaded piping sizes. Match the plug to the nominal size of the female-threaded opening being closed.
Square Head Plug vs. Threaded Cap
Square Head Solid Plug
- Male threaded connection
- Threads into an opening
- External square wrenching head
- Closes a female-threaded connection
- Useful where a compact internal closure is required
Threaded Cap
- Female threaded connection
- Threads over a male end
- Encloses the end connection
- Available as a separate Charman fitting
- Used where an exposed male-threaded end must be closed
Where a Charman SP114 Square Head Plug Makes Sense
- For closing threaded ports
- During piping repair or maintenance
- For unused female-threaded openings
- Where 316 stainless steel construction is appropriate
- For compatible plumbing, industrial, and process piping systems
- When a removable threaded closure with external wrenching surfaces is preferred
Installation & Selection Considerations
- Select the plug size that matches the opening.
- Confirm the mating female thread is compatible before installation.
- Inspect both threaded surfaces for damage, debris, or contamination.
- Use a thread-sealing method appropriate for the intended piping system.
- Verify pressure, temperature, media, material, and installation requirements before use.
Product Selection Considerations
Nominal Size
Select the 316 Stainless Steel 150# Threaded Square Head Solid Plug - SP114 according to the nominal size of the female-threaded opening being closed. This listing includes sizes from 1/8" through 3".
Closure Requirements
Confirm the mating thread, piping material, service media, pressure, temperature, wrench access, and applicable installation requirements before selecting the plug.

Review the Charman Inc stainless steel fittings specification sheet for product and dimensional information on the SP114 square head solid plug, or use the complete stainless steel fittings catalog to compare available fitting styles, configurations, and sizes before ordering.
Need Help Selecting a Stainless Steel Pipe Fitting?
Our industrial PVF specialists can help review your pipe size, connection type, stainless steel requirements, application, and installation conditions before you order.
Frequently Asked Questions
What material is the SP114 Solid Plug?
Charman identifies this product family as a 316 stainless steel fitting.
Are these plugs threaded?
Yes. These SP114 Square Head Solid Plugs use a male threaded connection.
What sizes are available?
This listing includes 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", and 3" nominal sizes.
What does a square head solid plug do?
A square head solid plug threads into a compatible female-threaded opening to provide a removable solid closure.
Which Charman SKUs are included?
The included part numbers are 316470, 316471, 316472, 316473, 316474, 316475, 316476, 316477, 316478, and 316480.
Why does the plug have a square head?
The square head provides flat wrenching surfaces for tightening and removing the threaded plug.
Where can I review Charman stainless steel fitting information?
The Charman Stainless Steel Fittings Spec Sheet and Complete Catalog are linked directly above for additional product and fitting information.
What should I confirm before ordering?
Confirm nominal size, thread compatibility, material requirements, pressure, temperature, media, and installation conditions before ordering.
Important Ordering & Installation Notes
- Ten nominal sizes are available.
- Match the plug to the female-threaded opening size.
- Review the supplied Charman documents for additional fitting information.
- Confirm thread compatibility and sealing requirements before installation.
- Verify material, pressure, temperature, media, wrench access, and installation requirements before service.