Merit Brass
125# Lead Free Brass Hex Locknut
- SKU:
- XNL119
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
125# Lead Free Brass Hex Locknut
125# Lead Free Brass Hex Locknuts are threaded fittings designed to secure compatible threaded components in plumbing and piping assemblies. The hex-shaped exterior provides wrench flats for tightening and removal, while the internal female threads allow the locknut to engage a matching male-threaded connection.
These fittings conform with the lead-content requirements for lead-free plumbing as defined by the U.S. Safe Drinking Water Act and are certified to contain ≤0.25 weighted average % lead. Manufacturer dimensional, certification, and material safety documentation is provided below.
Product Highlights
- 125# lead free brass hex locknut
- Female threaded connection
- Hex-shaped exterior provides wrench flats
- Designed to secure compatible threaded components
- Compact threaded fitting configuration
- Lead free brass construction
- Conforms with lead-content requirements for lead-free plumbing under the U.S. Safe Drinking Water Act
- Certified ≤0.25 weighted average % lead
- Suitable for compatible threaded plumbing and piping assemblies
- Manufacturer dimensional and certification documentation available
Hex Locknut Construction
A hex locknut is an internally threaded fitting designed to engage a compatible male-threaded component and help secure it in position within a piping or plumbing assembly.
The hex-shaped exterior provides flat wrenching surfaces for controlled tightening and removal during installation or maintenance.
Lead free brass construction makes this fitting suitable for applications requiring compliance with applicable lead-content requirements for plumbing products.
Technical Specifications
| Product Type | Hex Locknut |
|---|---|
| Pressure Class | 125# |
| Material | Lead Free Brass |
| Connection Type | Threaded |
| Thread Configuration | Female Threaded |
| Body Style | Hex |
| Lead Content | ≤0.25 Weighted Average % Lead |
| Compliance | Conforms with Lead Content Requirements for Lead Free Plumbing as Defined by the U.S. Safe Drinking Water Act |
| Primary Function | Securing a Compatible Male-Threaded Component |
Why Choose a Lead Free Brass Hex Locknut?
Secure Threaded Connection
- Designed to engage compatible male threads
- Helps secure threaded components in position
- Compact fitting profile
- Useful in threaded plumbing assemblies
- Removable for future service or adjustment
Hex Body Design
- Provides wrench flats for installation
- Allows controlled tightening
- Simplifies removal during maintenance
- Convenient for confined installation areas
- Suitable for compatible threaded assemblies
Lead Free Compliance
The supplied product information states that these fittings conform with lead-content requirements for lead-free plumbing as defined by the U.S. Safe Drinking Water Act.
The fittings are also identified as being certified to contain ≤0.25 weighted average % lead. Review the manufacturer certification letter in the Product Documents section for additional certification information.
Common Applications
Plumbing & Water Systems
- Potable-water piping where applicable
- Commercial plumbing assemblies
- Water distribution components
- Threaded fixture connections
- General lead free brass piping assemblies
Commercial & General Service
- Mechanical piping installations
- Utility piping systems
- Equipment connections
- Threaded component retention
- Applications requiring a removable threaded locknut
Installation & Selection Guidance
- Confirm the required nominal locknut size before ordering.
- Verify thread compatibility with the mating male-threaded component.
- Use the hex wrenching surfaces for tightening and removal.
- Avoid over-tightening threaded brass components.
- Confirm that the 125# fitting class is suitable for the intended system.
- Verify media, pressure, and temperature compatibility before installation.
- Confirm lead-free requirements for the specific plumbing application.
- Inspect the completed assembly before placing the system into service.
- Installation should comply with applicable plumbing codes and project requirements.
Important Ordering Notes
- Product is a 125# lead free brass hex locknut.
- Female threaded configuration.
- Hex body provides wrench flats for installation and removal.
- Designed to secure a compatible male-threaded component.
- Conforms with lead-content requirements for lead-free plumbing as defined by the U.S. Safe Drinking Water Act.
- Certified ≤0.25 weighted average % lead.
- Confirm nominal thread size before ordering.
- Verify compatibility with the mating male-threaded component.
- Confirm pressure, temperature, and media compatibility before use.
- Review applicable plumbing-code requirements for potable-water installations.
- Refer to the manufacturer dimensional, certification, and material safety documents for additional product information.
Product Documents
Frequently Asked Questions
What is a brass hex locknut used for?
A brass hex locknut is used to engage a compatible male-threaded component and help secure it in position within a plumbing or piping assembly.
What type of thread does this locknut use?
The locknut uses an internal female threaded connection.
Why does the locknut have a hex-shaped body?
The hex body provides wrench flats that make the locknut easier to tighten, loosen, and remove during installation and maintenance.
What pressure class is this fitting?
This fitting is identified as a 125# lead free brass hex locknut.
Is this fitting lead free?
Yes. The supplied product information states that it conforms with lead-content requirements for lead-free plumbing as defined by the U.S. Safe Drinking Water Act.
What is the certified lead content?
The fitting is identified as containing no more than 0.25 weighted average percent lead.
Can this locknut be removed later?
Yes. Because it is threaded, the locknut can be loosened and removed for servicing, adjustment, or replacement.
Can this fitting be used in potable-water systems?
The supplied product information states that the fitting conforms with U.S. Safe Drinking Water Act lead-content requirements for lead-free plumbing. Confirm all applicable local plumbing-code and system requirements before installation.
Where can I find fitting dimensions?
Use the Import Brass Fitting Dimensions document in the Product Documents section above.
Where can I verify the lead-free certification?
Use the Import Brass Fitting Certification Letter provided in the Product Documents section above.
Is material safety information available?
Yes. A manufacturer Material Safety Data Sheet is provided in the Product Documents section above.

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