Merit Brass
150# Stainless Steel Solid Square Head Plug ISO 49
- SKU:
- K417A-K617A
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Stainless Steel Solid Square Head Plug ISO 49
150# Stainless Steel Solid Square Head Plugs are standard-pattern cast fittings designed to close compatible female-threaded openings in stainless steel piping systems. The solid-body construction provides a durable threaded closure, while the external square head offers a positive wrenching surface for installation and removal.
The fitting family conforms to AISI 304 or 316 stainless steel material requirements and ISO 49-1983 (E) dimensional requirements. These fittings are also listed as low lead certified to NSF/ANSI 61.
Product Highlights
- 150# stainless steel solid square head plug
- Standard-pattern cast fitting design
- Designed to close compatible female-threaded openings
- Solid-body plug construction
- External square head provides a wrenching surface
- Available in AISI 304 or 316 stainless steel material
- Low lead certified to NSF/ANSI 61
- Dimensions conform to ISO 49-1983 (E)
- Corrosion-resistant stainless steel construction
- Designed for straightforward installation and removal
- Helps prevent contamination from rust, scale, and small particles
- Resists corrosive attack from many industrial and chemical solutions and mixtures
- Provides 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 |
| Material Grades | AISI 304 or 316 |
| Dimensional Standard | ISO 49-1983 (E) |
| Head Style | Square Head |
| Construction Style | Solid Standard Pattern Cast Fitting |
| Primary Function | Threaded Opening Closure |
| Certification | Low Lead Certified NSF/ANSI 61 |
Solid Square Head Plug Design
A solid square head plug is used to close a compatible female-threaded fitting, valve, port, or piping opening. The solid-body design distinguishes it from a cored plug configuration while serving the same general end-closure function.
The external square head gives the installer a defined wrenching surface for tightening or removal.
Square Head Design
The square head provides four wrenching surfaces for positive tool engagement during installation and removal.
This makes the fitting useful where a threaded opening must be securely closed but may need to be reopened later for maintenance, inspection, or system modification.
Solid vs. Cored Square Head Plug
Solid Square Head Plug
- Solid-body plug construction
- Designed to close female-threaded openings
- External square head for wrench engagement
- Used as a removable threaded closure
Cored Square Head Plug
- Cored-body plug construction
- Also closes compatible female-threaded openings
- External square head for wrench engagement
- Different body configuration from the solid plug
Stainless Steel Construction
The stainless steel construction provides corrosion resistance while helping prevent contamination associated with rust, scale, and small particles that can occur with some other metallic piping materials.
The supplied product information states that the material resists corrosive attack from hundreds of industrial and chemical solutions and mixtures and provides greater strength at elevated temperatures.
NSF/ANSI 61 Low Lead Certification
This fitting is listed as low lead certified to NSF/ANSI 61, supporting use in compatible potable-water applications where applicable code and system requirements are met.
Always confirm complete system requirements, local codes, operating conditions, and media compatibility before installation.
ISO 49 Standard Pattern
Dimensions conform to ISO 49-1983 (E), providing dimensional consistency for compatible standard-pattern cast stainless steel fittings.
Use the manufacturer dimensional document below to confirm plug dimensions before ordering or installation.
Common Applications
Commercial & General Piping
- Closing unused threaded ports
- Water piping systems
- Commercial plumbing
- Valve and equipment openings
- Threaded stainless steel piping assemblies
Industrial & Corrosive Service
- Industrial process piping
- Chemical handling systems
- Corrosion-resistant piping applications
- Elevated-temperature service where compatible
- Applications where rust and scale contamination are undesirable
Need Help With Fitting Selection?
Confirm the nominal thread size, 150# pressure class, required stainless steel grade, mating female-threaded connection, operating temperature, media compatibility, and applicable system requirements before ordering.
Use the product documents below to review standard-pattern cast fitting dimensions and common pipe diameter and wall thickness information.
Product Documents
Merit Stainless Steel Standard Pattern Cast Fittings
Use this manufacturer reference for dimensional and product information covering Merit standard-pattern cast stainless steel fittings.
- Standard-pattern cast fitting information
- Useful for confirming solid square head plug dimensions
- Supports ISO 49 fitting selection
- Recommended for dimensional review before ordering
Pipe Chart: Common Diameters & Wall Thicknesses
Use this pipe chart to confirm common nominal pipe sizes, outside diameters, and wall thicknesses when working with compatible piping components.
- Common pipe outside diameters
- Reference wall thickness information
- Useful for confirming piping system dimensions
- Recommended before ordering or installation
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 plug?
This fitting is listed as a 150# stainless steel plug.
Why does the plug have a square head?
The square head provides four wrenching surfaces for tightening and removing the plug.
What does "solid" mean in this product description?
The product is identified as a solid square head plug, distinguishing its body construction from a cored square head plug.
How is a solid square head plug different from a cored square head plug?
Both are threaded closure fittings with square heads. The distinction is the body construction: one is identified as solid and the other as cored.
What stainless steel grades are used?
The supplied product information states that the fitting family conforms to AISI 304 or 316 stainless steel material requirements.
What dimensional standard applies?
The fitting dimensions conform to ISO 49-1983 (E).
Is this fitting low lead certified?
Yes. The supplied product information lists the fitting as low lead certified to NSF/ANSI 61.
Why use stainless steel for this fitting?
Stainless steel provides corrosion resistance and helps avoid contamination associated with rust and scale in compatible applications.
Where can I find fitting dimensions?
Use the Merit Stainless Steel Standard Pattern Cast Fittings PDF in the Product Documents section above.
How can I confirm common pipe dimensions?
Use the Pipe Chart: Common Diameters & Wall Thicknesses PDF in the Product Documents section above.
Important Ordering Notes
- Product type: 150# Stainless Steel Solid Square Head Plug.
- Designed to close compatible female-threaded openings.
- Solid-body construction.
- Square head provides a wrenching surface for installation and removal.
- Low lead certified to NSF/ANSI 61.
- Material conforms to AISI 304 or 316 requirements.
- Dimensions conform to ISO 49-1983 (E).
- Stainless steel construction provides corrosion resistance.
- Confirm nominal thread size, material grade, system pressure, operating temperature, and media compatibility before ordering.
- Verify applicable potable-water and local-code requirements when used in drinking-water systems.
- Refer to both Product Documents for fitting and pipe dimensional information.
