Merit Brass
150# Stainless Steel Locknut MSS SP114
- SKU:
- M419-M619
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Stainless Steel Locknut MSS SP114
150# Stainless Steel Locknuts MSS SP114 are threaded fittings designed to secure compatible threaded piping components in place within commercial, industrial, and process piping assemblies. The compact locknut configuration provides a practical means of retaining threaded components against fittings, equipment, panels, or other mating surfaces.
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 water, industrial, and process applications.
Product Highlights
- 150# stainless steel locknut
- Designed to secure compatible threaded components
- Compact threaded retaining configuration
- 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 threaded installation
- 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 | Locknut |
|---|---|
| Pressure Class | 150# |
| Material | Stainless Steel |
| Available Grades | 304 & 316 Stainless Steel |
| Pattern | MSS SP-114 |
| Connection Type | Female Threaded |
| Configuration | Threaded Retaining Nut |
| Certification | Low Lead Certified NSF 61 |
| Primary Function | Securing Compatible Threaded Components |
| Primary Applications | Commercial, Industrial, Water and Process Piping Systems |
Locknut Construction
A locknut threads onto a compatible externally threaded component and is tightened against a mating fitting, surface, panel, or assembly to help hold the component securely in position.
The compact body minimizes added assembly length while providing a practical threaded retaining point for compatible piping and equipment connections.
Manufactured from 304 or 316 stainless steel, these locknuts provide corrosion resistance and dependable threaded performance in compatible commercial, industrial, water, and process piping applications.
Why Choose a Stainless Steel Locknut?
Threaded Component Retention
- Helps secure compatible threaded components
- Compact retaining configuration
- Useful against fittings, panels, equipment, or mating surfaces
- Allows straightforward threaded installation
- Can support serviceable mechanical connections
Corrosion Resistance
- Resists rust and scale formation
- Suitable for demanding piping environments
- Resists attack from many industrial and chemical solutions and mixtures
- Helps maintain cleaner process environments
- Provides long service life compared with many alternative metals
Locknut vs. Standard Coupling
Locknut
- Designed primarily for component retention
- Threads onto an externally threaded component
- Compact body profile
- Tightens against a mating surface or component
- Not intended to join two pipe sections like a coupling
Standard Coupling
- Designed to join two threaded pipe sections
- Female threaded connections on both ends
- Used for straight in-line piping connections
- Provides pipe-to-pipe connection rather than retention
- Different function from a locknut
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
- Threaded piping assemblies
- Commercial plumbing systems
- Mechanical piping installations
- Equipment connections
- Component retention applications
Industrial & Process Applications
- Industrial process piping
- Chemical processing systems
- Water treatment applications
- Process equipment connections
- Corrosion-resistant threaded assemblies
Installation & Selection Guidance
- Confirm the required nominal thread size before ordering.
- Select 304 or 316 stainless steel based on the operating environment and required corrosion resistance.
- Verify that the mating externally threaded component is compatible with the locknut.
- Confirm that sufficient thread engagement is available for the intended installation.
- Verify system pressure and temperature requirements where the locknut is part of a pressure-containing assembly.
- Confirm compatibility between the stainless steel fitting and the surrounding system environment.
- Use appropriate installation tools to tighten the locknut against the mating surface.
- Avoid over-tightening threaded stainless steel components.
- Inspect the completed assembly to confirm the component is securely retained.
- 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 locknut 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 Locknut?
Our industrial PVF specialists can help review your thread size, stainless steel grade, application, mating component, and installation requirements before you order.
Frequently Asked Questions
What is a stainless steel locknut used for?
A stainless steel locknut is used to secure a compatible externally threaded component against a fitting, panel, equipment surface, or other mating component.
What pressure class is this fitting?
This fitting is listed as a 150# stainless steel locknut.
What stainless steel grades are available?
These locknuts 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 locknut low lead certified?
Yes. The supplied product information identifies these fittings as low lead certified to NSF 61.
How does a locknut work?
The locknut threads onto a compatible externally threaded component and is tightened against a mating surface to help retain the component in position.
Is a locknut the same as a coupling?
No. A locknut is primarily used to retain a threaded component, while a coupling is designed to join two threaded pipe sections together.
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.
Can stainless steel locknuts be used at elevated temperatures?
The supplied product information notes that stainless steel provides greater strength at elevated temperatures. Actual allowable service conditions depend on the complete assembly and application requirements.
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 locknut.
- Available in 304 and 316 stainless steel grades.
- Manufactured as an MSS SP-114 pattern fitting.
- Low lead certified to NSF 61.
- Designed to secure compatible externally threaded components.
- Confirm the nominal thread size before ordering.
- Select the appropriate 304 or 316 stainless steel grade for the application.
- Verify thread compatibility with the mating component before installation.
- Confirm adequate thread engagement and installation clearance.
- Verify pressure, temperature, media, and environmental compatibility where applicable.
- Refer to the Merit Brass dimensional documentation for applicable fitting dimensions.
