A4-80 Stainless Steel Hex Nut
A4-80 stainless steel hex nut is a high-strength corrosion-resistant fastening component designed for demanding industrial applications. The A4-80 stainless steel hex nut is manufactured from A4-80 stainless steel material, providing excellent mechanical strength, superior corrosion resistance, and reliable thread performance in harsh environments.
The A4-80 stainless steel hex nut is widely used in marine equipment, offshore structures, chemical processing systems, petrochemical facilities, food machinery, and industrial assemblies where high-strength stainless steel fastening solutions are required.

Product Overview
The A4-80 stainless steel hex nut is a standard hexagonal fastening component used together with compatible bolts, screws, and studs to create secure threaded connections. The A4-80 strength grade provides higher mechanical performance compared with standard stainless steel nuts.
A4 stainless steel is commonly associated with 316 stainless steel characteristics, offering excellent resistance to chlorides, seawater, and chemical exposure. The A4-80 stainless steel hex nut combines corrosion resistance with high tensile performance, making it suitable for critical fastening applications.
Compared with standard A2-70 stainless steel nuts, the A4-80 hex nut provides improved strength and better performance in aggressive environments.
Product Specifications
| Item | Description |
|---|---|
| Product Name | A4-80 Stainless Steel Hex Nut |
| Material | A4 Stainless Steel |
| Material Grade | A4-80 |
| Equivalent Material | 316 Stainless Steel |
| Nut Type | Hex Nut |
| Thread Standard | Metric / UNC / UNF Customized |
| Size Range | According to Standard Requirement |
| Thread Direction | Right Hand |
| Surface Finish | Natural Stainless Steel |
| Strength Grade | A4-80 |
| Application | Industrial, Marine, Chemical Fastening |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Size, thread, packaging available |
Technical Parameters
| Parameter | Value |
|---|---|
| Material | A4-80 Stainless Steel |
| Tensile Strength | ≥800 MPa |
| Yield Strength | According to A4-80 Specification |
| Hardness | According to Material Requirement |
| Density | Approx. 8.0 g/cm³ |
| Corrosion Resistance | Excellent |
| Chloride Resistance | Excellent |
| Temperature Resistance | Good |
| Manufacturing Standard | ISO / DIN / Customized |
Materials and Manufacturing Process
The A4-80 stainless steel hex nut is manufactured through precision forming and thread processing procedures to ensure stable dimensions and reliable fastening performance.
- Raw material selection: High-quality A4-80 stainless steel
- Material inspection: Chemical composition verification
- Nut forming: Cold forging process for efficient production and structural strength
- Thread processing: Precision internal thread tapping
- Cleaning process: Removal of processing residues
- Surface finishing: Natural stainless steel cleaning and passivation when required
- Inspection: Thread gauge testing, dimensional inspection, and surface quality verification
- Packaging: Protective industrial packaging for transportation
Each A4-80 stainless steel hex nut is produced under strict quality control to ensure consistent performance.
Applications of the Product
The A4-80 stainless steel hex nut is widely used in industries requiring high-strength and corrosion-resistant fastening:
- Marine industry: Shipbuilding and offshore equipment
- Chemical industry: Corrosive processing systems
- Petrochemical industry: Industrial equipment and pipeline assemblies
- Food equipment: Hygienic stainless steel machinery
- Renewable energy: Wind and solar structures
- Construction industry: Stainless steel structural connections
- Industrial machinery: Heavy-duty equipment assembly
- Manufacturing systems: Precision fastening applications
Its excellent corrosion resistance makes it suitable for both indoor and outdoor industrial environments.
Why Choose This Product
- A4-80 high-strength stainless steel material
- Excellent resistance to seawater and chlorides
- Higher strength than standard stainless steel grades
- Reliable thread engagement
- Suitable for harsh industrial environments
- Long service life
- Stable mechanical performance
- OEM customization support
The A4-80 stainless steel hex nut provides a dependable fastening solution for demanding applications requiring strength and corrosion resistance.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and customized fastening solutions.
- Experience with stainless steel fastening products
- Support for high-strength stainless steel grades
- Advanced cold forging and thread processing capability
- Strict material traceability management
- OEM/ODM customization support
- Stable bulk production capability
- Global export experience
- Engineering support for customized fastening requirements
Flybear provides reliable fastening products for marine, chemical, machinery, and industrial customers worldwide.
Quality Inspection and Control
Quality assurance is maintained throughout production:
- Stainless steel chemical composition analysis
- Raw material certificate verification
- Thread gauge inspection
- Dimensional accuracy inspection
- Mechanical property testing
- Surface finish inspection
- Corrosion resistance verification when required
- Packaging quality inspection
All manufacturing processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting an A4-80 stainless steel hex nut, consider:
- Matching bolt or stud specification
- Required strength grade
- Operating environment
- Corrosion exposure level
- Temperature conditions
- Thread compatibility
Correct selection ensures secure fastening performance and long-term connection reliability.
FAQ
1. What is an A4-80 stainless steel hex nut used for?
It is used for high-strength fastening applications requiring excellent corrosion resistance.
2. What does A4-80 mean in stainless steel nuts?
A4-80 indicates an austenitic stainless steel fastener grade with a minimum tensile strength of 800 MPa.
3. Is A4-80 stainless steel equivalent to 316 stainless steel?
A4 stainless steel is commonly associated with 316 stainless steel corrosion resistance properties.
4. Can A4-80 hex nuts be customized?
Yes, Flybear supports customized sizes, threads, materials, and packaging.
5. Where are A4-80 hex nuts commonly used?
They are widely used in marine, offshore, chemical, petrochemical, and industrial 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.




