Merit Brass
150# Stainless Steel Solid Square Head Plug MSS SP114
- SKU:
- M417A-M617A
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Stainless Steel Solid Square Head Plug MSS SP114
150# Stainless Steel Solid Square Head Plugs MSS SP114 are threaded closure fittings designed to seal compatible female-threaded openings in piping systems, valves, fittings, and equipment. The solid plug construction provides a durable closure, while the external square head offers a defined wrenching surface for installation and removal.
Available in 304 and 316 stainless steel, these fittings are manufactured as MSS SP-114 pattern fittings and are listed as low lead certified to NSF 61. Stainless steel construction helps resist corrosion, rust, scale, and contamination while providing dependable performance in commercial, industrial, water, and process piping applications.
Product Highlights
- 150# stainless steel solid square head plug
- Designed to close compatible female-threaded openings
- Solid plug construction
- External square head provides a wrenching surface
- Available in 304 and 316 stainless steel grades
- MSS SP-114 pattern fitting
- Low lead certified to NSF 61
- Corrosion-resistant stainless steel construction
- Designed for straightforward installation and removal
- Helps prevent contamination from rust, scale, and small particles
- Resists corrosive attack from a wide range of industrial and chemical solutions and mixtures
- Maintains strength at elevated temperatures
- Long service-life potential in compatible applications
Technical Specifications
| Product Type | Solid Square Head Plug |
|---|---|
| Pressure Class | 150# |
| Material | Stainless Steel |
| Available Grades | 304 & 316 Stainless Steel |
| Pattern | MSS SP-114 |
| Connection Type | Male Threaded |
| Head Style | Square Head |
| Construction Style | Solid Plug |
| Certification | Low Lead Certified NSF 61 |
| Primary Function | Closing Female-Threaded Openings |
Solid Square Head Plug Construction
A solid square head plug is designed to thread into a compatible female-threaded opening and provide a removable closure. It can be used to close ports in piping fittings, valves, equipment, or other threaded system components.
The solid-body construction distinguishes this fitting from a cored square head plug, while the external square head provides flat wrenching surfaces for tightening and removal.
Manufactured from 304 or 316 stainless steel, these plugs provide corrosion resistance and dependable threaded performance in compatible commercial, industrial, water, and process piping systems.
Why Choose a Stainless Steel Solid Square Head Plug?
Removable Threaded Closure
- Closes compatible female-threaded openings
- Male threaded connection
- Can be removed for maintenance or system changes
- Useful for fittings, valves, equipment, and piping ports
- Compact threaded closure configuration
Square Head Design
- External square head provides wrenching surfaces
- Offers positive tool engagement
- Simplifies tightening during installation
- Helps with removal during maintenance
- Suitable for accessible threaded closure points
Solid Plug vs. Cored Plug
Solid Square Head Plug
- Solid body construction
- Male threaded closure
- Square head for wrench engagement
- Designed to close female-threaded openings
- Different body construction from the cored version
Cored Square Head Plug
- Cored body construction
- Male threaded closure
- Square head for wrench engagement
- Also used to close female-threaded openings
- Manufacturer-specific body configuration
304 vs. 316 Stainless Steel
304 Stainless Steel
304 stainless steel provides corrosion resistance for a wide range of general-purpose water, commercial, and industrial piping applications. It is commonly selected where dependable stainless steel performance is required without the additional corrosion resistance provided by 316 stainless steel.
316 Stainless Steel
316 stainless steel provides enhanced corrosion resistance for more aggressive environments and is commonly selected for applications involving chemicals, chlorides, process fluids, marine exposure, and other demanding service conditions.
Common Applications
Commercial & General Piping
- Closing unused threaded ports
- Water piping systems
- Commercial plumbing systems
- Valve and equipment openings
- Mechanical piping installations
Industrial & Process Applications
- Industrial process piping
- Chemical processing systems
- Water treatment applications
- Process fluid piping
- Corrosion-resistant threaded assemblies
Installation & Selection Guidance
- Confirm the nominal male thread size before ordering.
- Select 304 or 316 stainless steel based on the operating environment and required corrosion resistance.
- Verify that the mating female-threaded opening is compatible with the plug.
- Confirm system pressure and temperature requirements before installation.
- Verify compatibility between the stainless steel fitting and the system media.
- Use appropriate thread sealant suitable for the piping material, media, pressure, and temperature.
- Use the square head as the wrenching surface during installation or removal.
- Avoid over-tightening threaded stainless steel connections.
- Inspect the completed connection for leaks before placing the system into service.
- Installation should be completed in accordance with applicable piping codes and project specifications.
Product Documents
Merit Brass Heavy Pattern 150# Dimensions
Review dimensional information for Merit Brass stainless steel MSS pattern fittings, including applicable solid square head plug dimensions.
Common Pipe Diameters & Wall Thicknesses
Reference common pipe outside diameters and wall thicknesses when selecting compatible piping and threaded connection components.
Need Help Selecting a Stainless Steel Solid Square Head Plug?
Our industrial PVF specialists can help review your thread size, stainless steel grade, pressure requirements, application, and closure requirements before you order.
Frequently Asked Questions
What is a solid square head plug used for?
A solid square head plug is used to close a compatible female-threaded opening in a piping system, fitting, valve, or equipment connection.
What pressure class is this fitting?
This fitting is listed as a 150# stainless steel plug.
What stainless steel grades are available?
These plugs are available in 304 and 316 stainless steel.
What pattern does this fitting conform to?
The fitting is identified as an MSS SP-114 pattern stainless steel fitting.
Is this plug low lead certified?
Yes. The supplied product information identifies these fittings as low lead certified to NSF 61.
What connection does this plug use?
The plug uses an external male threaded connection designed to install into a compatible female-threaded opening.
Why does the plug have a square head?
The square head provides flat wrenching surfaces for tightening and removing the plug during installation or maintenance.
How is a solid square head plug different from a cored square head plug?
Both are male-threaded closure fittings with square wrenching heads. The difference is the body construction: one is identified as solid and the other as cored.
What is the difference between 304 and 316 stainless steel?
Both grades provide strong corrosion resistance. 316 stainless steel generally provides additional resistance in more aggressive chemical, chloride, marine, and corrosive environments.
Where can I find fitting dimensions?
Use the Merit Brass Heavy Pattern 150# Dimensions document in the Product Documents section above.
Important Ordering Notes
- Product is a 150# stainless steel solid square head plug.
- Available in 304 and 316 stainless steel grades.
- Manufactured as an MSS SP-114 pattern fitting.
- Low lead certified to NSF 61.
- Male threaded closure configuration.
- Solid-body plug construction.
- Square head provides a wrenching surface for installation and removal.
- Confirm the nominal male thread size before ordering.
- Select the appropriate 304 or 316 stainless steel grade for the application.
- Verify thread compatibility with the mating female connection before installation.
- Confirm system pressure, temperature, and media compatibility before use.
- Refer to the Merit Brass dimensional documentation for applicable fitting dimensions.
