GR.7 Alloy Steel Xylan Coated Hex Nut ASME B18.2.4.1M
GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M is a high-strength fastening component designed for industrial applications requiring excellent mechanical performance, corrosion protection, and reduced friction during assembly. The GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M is manufactured from Grade 7 alloy steel and coated with Xylan fluoropolymer coating, providing improved corrosion resistance, anti-seizing performance, and enhanced durability.
The GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M is widely used in petrochemical equipment, pressure systems, construction machinery, heavy equipment, and industrial fastening assemblies where reliable threaded connections are required.

Product Overview
The GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M is a standard hexagonal nut designed for use with compatible bolts and studs in demanding industrial environments. ASME B18.2.4.1M defines metric hex nut dimensional requirements, while the Grade 7 alloy steel material provides high mechanical strength.
The Xylan coating, a fluoropolymer-based protective coating, offers low friction characteristics and improved resistance against corrosion, chemicals, and environmental exposure. The GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M helps reduce galling risk during installation and provides more consistent tightening performance.
This product is suitable for engineering applications where both strength and surface protection are required.

Product Specifications
| Item | Description |
|---|---|
| Product Name | GR.7 Alloy Steel Xylan Coated Hex Nut |
| Standard | ASME B18.2.4.1M |
| Material | Grade 7 Alloy Steel |
| Nut Type | Hex Nut |
| Coating Type | Xylan Fluoropolymer Coating |
| Thread Standard | Metric Thread |
| Size Range | According to ASME B18.2.4.1M |
| Thread Direction | Right Hand |
| Surface Finish | Xylan Coated |
| Strength Grade | Grade 7 |
| Application | Industrial High-Strength Fastening |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Size, coating, packaging available |
Technical Parameters
| Parameter | Value |
|---|---|
| Material | GR.7 Alloy Steel |
| Strength Grade | Grade 7 |
| Tensile Performance | High Strength Fastening Grade |
| Yield Strength | According to Material Specification |
| Hardness | According to Grade Requirement |
| Coating Material | Xylan Fluoropolymer |
| Friction Performance | Low Friction Surface |
| Corrosion Resistance | Enhanced by Coating |
| Manufacturing Standard | ASME B18.2.4.1M |
Materials and Manufacturing Process
The GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M is manufactured through controlled alloy steel processing, precision forming, heat treatment, and coating procedures.
- Raw material selection: High-quality Grade 7 alloy steel
- Material inspection: Chemical composition verification
- Nut forming: Precision forging process for structural strength
- Thread processing: Accurate internal thread tapping
- Heat treatment: Improves mechanical properties and hardness
- Surface preparation: Cleaning and pre-treatment before coating
- Xylan coating: Application of fluoropolymer protective layer
- Inspection: Thread gauge testing, dimensional inspection, coating thickness inspection, and surface quality verification
- Packaging: Protective industrial packaging for transportation
Each GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M is produced under strict quality control to ensure reliable performance.

Applications of the Product
The GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M is widely used in industries requiring high-strength and corrosion-resistant fastening:
- Petrochemical industry: Pipeline systems and industrial equipment
- Oil and gas industry: Heavy-duty fastening assemblies
- Construction industry: Steel structures and mechanical connections
- Machinery manufacturing: Large equipment installation
- Power generation: Industrial plant equipment
- Pressure equipment: High-load fastening systems
- Transportation equipment: Heavy machinery applications
- Engineering projects: Customized fastening solutions
Its combination of alloy steel strength and Xylan coating makes it suitable for demanding industrial environments.
Why Choose This Product
- High-strength GR.7 alloy steel construction
- Xylan fluoropolymer coating improves corrosion protection
- Reduced friction during assembly
- Improved anti-seizing performance
- Stable mechanical properties
- Suitable for industrial applications
- Compatible with metric fastening systems
- OEM customization support
The GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M provides a reliable fastening solution for applications requiring strength and surface protection.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and customized fastening solutions.
- Experience with alloy steel coated fasteners
- Support for ASME standard nut production
- Advanced heat treatment and coating capability
- Professional surface treatment management
- OEM/ODM customization support
- Stable production capacity for bulk supply
- Global export experience
- Engineering support for customized fastening requirements
Flybear provides reliable fastening products for petrochemical, machinery, construction, and industrial customers worldwide.
Quality Inspection and Control
Quality assurance is maintained throughout production:
- Alloy steel chemical composition analysis
- Raw material certificate verification
- Heat treatment inspection
- Thread gauge inspection
- Dimensional accuracy inspection
- Hardness testing
- Xylan coating thickness inspection
- Surface quality inspection
- Packaging inspection
All manufacturing processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting a GR.7 alloy steel Xylan coated hex nut ASME B18.2.4.1M, consider:
- Matching bolt or stud specification
- Required strength level
- Operating temperature conditions
- Chemical exposure environment
- Required coating performance
- Installation requirements
Correct selection ensures secure fastening and long-term connection reliability.
FAQ
1. What is a GR.7 alloy steel hex nut used for?
It is used for high-strength fastening applications in industrial equipment, machinery, and structural systems.
2. What is Xylan coating on a nut?
Xylan is a fluoropolymer coating that provides low friction and improved corrosion protection.
3. What are the advantages of Xylan coated nuts?
They reduce friction, improve anti-seizing performance, and provide additional surface protection.
4. Can GR.7 Xylan coated hex nuts be customized?
Yes, Flybear supports customized sizes, coatings, thread specifications, and packaging.
5. Which industries use Xylan coated alloy steel nuts?
They are commonly used in petrochemical, oil and gas, construction, machinery, and industrial equipment applications.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.




