Charman Inc.
304 Stainless Steel 150# Threaded Cap - SP112
- Availability:
- Usually in Stock – Ships Quickly
- Weight:
- 0.00 LBS
Description
304 Stainless Steel 150# Threaded Cap - SP112
Charman Inc 304 Stainless Steel 150# Threaded Caps - SP112 provide a durable, corrosion-resistant solution for closing the end of threaded piping, nipples, fittings, and process connections. These stainless steel threaded caps are available in nominal pipe sizes from 1/8" through 3".
The female NPT connection threads directly onto compatible male-threaded piping and fittings to terminate a line while maintaining a removable connection. The SP112 design provides a compact stainless steel fitting for threaded piping systems where a secure end closure is required.
Product Highlights
- Charman Inc SP112 threaded pipe cap
- 304 stainless steel construction
- 150# threaded fitting
- Female NPT threaded connection
- Designed to close and terminate male-threaded piping and fittings
- Corrosion-resistant stainless steel construction
- Available in nominal pipe sizes from 1/8" through 3"
- Removable threaded connection does not require welding
- Suitable for industrial, commercial, mechanical, process-piping, and general piping applications
Technical Specifications
| Product Type | Threaded Pipe Cap |
|---|---|
| Brand | Charman Inc |
| Series / Pattern | SP112 |
| Material | 304 Stainless Steel |
| Pressure Class | 150# |
| Connection | Female NPT |
| Available Sizes | 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2" and 3" |
| Primary Function | Closing and terminating male-threaded pipe and fitting connections |
What Is an SP112 Threaded Pipe Cap?
The Charman Inc SP112 is a female-threaded stainless steel pipe cap used to close the end of a male-threaded pipe, nipple, fitting, or equipment connection. Unlike a pipe plug, which threads into a female opening, a threaded cap installs over an externally threaded connection.
This configuration provides a compact and removable method of terminating a piping connection. SP112 threaded caps can be used at permanent line endings as well as locations that may need to be reopened later for maintenance, inspection, testing, cleaning, or system expansion.
Why Choose a 304 Stainless Steel SP112 Threaded Cap?
Corrosion-Resistant Construction
- 304 stainless steel provides good general corrosion resistance
- Suitable for many industrial and commercial piping environments
- Provides durable stainless steel construction
- Useful where corrosion resistance and clean stainless construction are important
- Suitable for a wide range of general process and mechanical applications
Threaded Installation
- Female NPT connection installs onto compatible male-threaded components
- No welding is required for assembly
- Allows the connection to be removed when necessary
- Useful for temporary or permanent line termination
- Available across a broad range of nominal pipe sizes
Common Applications
Industrial & Process Piping
- Process piping systems
- Industrial equipment connections
- Utility piping
- Maintenance and repair work
- Equipment and manifold connections
Commercial & Mechanical Systems
- Commercial plumbing systems
- Mechanical piping installations
- Threaded stainless steel piping
- Fabrication and equipment assemblies
- Line termination and future-extension points
Cap vs. Plug
A pipe cap and pipe plug can both be used to close a piping connection, but they attach differently. The SP112 cap contains female threads and installs over a male-threaded pipe, nipple, fitting, or equipment connection. A plug contains male threads and installs into a female-threaded opening.
Select the fitting style that matches the connection being terminated. The SP112 threaded caps in this listing are designed for compatible male NPT connections.
Where an SP112 Threaded Cap Makes Sense
- At the end of a male-threaded pipe or nipple
- On unused threaded equipment connections
- At piping termination points that may require future access
- For temporary isolation during fabrication or maintenance
- For protecting exposed male pipe connections when a line is not in service
- At planned future system-extension points

Ask Willy: Need Stainless Steel Fitting Information?
Review the Charman Inc stainless steel fittings specification sheet for product and dimensional information on the SP112 threaded cap, or use the complete stainless steel fittings catalog to compare available fitting styles, configurations, and sizes before ordering.
Installation & Selection Guidance
- Confirm the required nominal pipe size before ordering.
- Verify that the mating component has a compatible male NPT connection.
- Confirm that 304 stainless steel is compatible with the intended service.
- Inspect mating threads for contamination or damage before assembly.
- Use a thread-sealing method appropriate for the system media, operating conditions, and applicable codes.
- Begin threading by hand whenever possible to reduce the risk of cross-threading.
- Tighten using appropriate tools and accepted threaded-piping practices.
- Avoid excessive tightening that could damage the cap, mating fitting, or pipe threads.
- Confirm pressure and temperature requirements for the complete piping system.
- Pressure-test completed piping assemblies as required by the application and applicable codes.
- Installation should be completed by qualified personnel.
- Follow applicable piping codes, specifications, and installation procedures.
Product Selection Considerations
Nominal Pipe Size
Select the SP112 cap based on the nominal pipe size of the male NPT connection being terminated. Available sizes in this listing range from 1/8" through 3".
Material Compatibility
Confirm that 304 stainless steel is suitable for the system media, environment, pressure, temperature, and other application requirements before installation.
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 is the Charman Inc SP112?
The SP112 is a 304 stainless steel 150# threaded pipe cap designed to close a compatible male-threaded pipe, nipple, fitting, or equipment connection.
What is an SP112 threaded cap used for?
It is used to terminate a compatible male NPT piping connection where a female-threaded stainless steel cap is required.
What material is the SP112 cap made from?
The SP112 caps in this listing are manufactured from 304 stainless steel.
What type of connection does the SP112 have?
The cap has a female NPT threaded connection designed to install over a compatible male NPT connection.
What SP112 sizes are available?
This listing includes 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", and 3" nominal pipe sizes.
What is the difference between a pipe cap and a pipe plug?
A cap has female threads and installs over a male-threaded connection. A plug has male threads and installs into a female-threaded opening.
Does the SP112 threaded cap require welding?
No. The SP112 cap installs using its female NPT threaded connection and does not require a welded connection.
Should thread sealant be used?
Use a thread-sealing method appropriate for the system media, operating conditions, fitting materials, and applicable installation requirements.
Can an SP112 threaded cap be removed later?
Yes. The threaded connection allows the cap to be removed when access to the terminated connection is required.
Important Ordering Notes
- This listing is for a Charman Inc SP112 304 stainless steel 150# threaded pipe cap.
- Select the required nominal pipe size from the available options.
- Connection is female NPT.
- Available sizes range from 1/8" through 3".
- Confirm that the mating connection is the correct male NPT size before ordering.
- Confirm that 304 stainless steel is compatible with the intended system media and environment.
- Confirm system pressure, temperature, and application requirements before installation.
- Use suitable thread sealant where required by the application.
- Review the linked Charman Inc stainless steel fittings specification sheet and complete catalog when additional product or dimensional information is required.
- Installation should be completed in accordance with applicable piping practices and codes.