Stainless Steel A2/A4 Machine Screws for Industrial Procurement
Stainless Steel A2/A4 Machine Screws for Industrial Procurement
At JLHY, we supply stainless steel machine screws in A2 (304) and A4 (316) grades for industrial buyers who need corrosion-resistant metric fasteners with precise thread engagement. If you are sourcing for marine installations, food processing equipment, pharmaceutical machinery, or architectural hardware, our A2 and A4 machine screws give you clear material and specification options for application evaluation.
You can review the related product here: Machine Screws Stainless Steel A2 A4 Precision Grade.
Why B2B Buyers Specify A2 and A4 Stainless Steel Machine Screws
Our A2 stainless steel machine screws provide good all-round corrosion resistance for most indoor and outdoor environments. For chloride-rich and coastal environments, our A4 stainless steel option includes molybdenum and is suited to more demanding corrosion conditions.
We passivate our stainless machine screws after manufacturing to restore the chromium oxide layer that provides their corrosion resistance. This makes them suitable for professional sourcing projects where material grade, finish, thread fit, and batch documentation are part of supplier evaluation.
Key Product Specifications
- Material: Stainless Steel A2 (304) / A4 (316)
- Finish: Passivated
- Thread: Metric ISO
- Thread fit: ISO 965-1 6h
- Standard: DIN 963-966
- Head types: Flat, pan, and cheese
- Drive options: Phillips and slotted
- Size range: M2-M10
- Corrosion profile: A2 = good corrosion resistance; A4 = excellent resistance in chloride-rich environments
- Batch documentation: EN 10204 3.1 material certificates are available for every batch
- Traceability: Full batch traceability from raw material to finished product
Application Fit for Industrial and Commercial Projects
We recommend A2 stainless machine screws when your application needs good corrosion resistance across general indoor and outdoor environments. For marine, coastal, and chloride-rich environments, we recommend evaluating A4 stainless machine screws because of their higher corrosion resistance profile.
Our stainless steel machine screws are used in food processing equipment, pharmaceutical machinery, marine installations, and architectural hardware. These applications often require fasteners that combine corrosion resistance, stable metric thread engagement, and clear batch traceability.
Procurement Evaluation Points
When you compare stainless steel machine screw suppliers, you can evaluate our product against practical sourcing criteria such as material grade, passivated finish, DIN/ISO alignment, available head and drive types, size range, material certificate availability, and batch traceability.
For technical teams, the A2 versus A4 grade decision should be based on the operating environment. A2 is suitable for many indoor and outdoor conditions, while A4 is the stronger fit where chloride exposure, coastal conditions, or marine installation requirements are part of the specification.
Supply and Custom Sourcing Support
We stock common sizes for fast dispatch and produce non-standard sizes on short lead times. If your procurement list includes multiple head types, drive types, or metric sizes within M2-M10, you can contact our technical team to specify the correct grade and size for your application environment.
Request Technical Support or a Quote
At JLHY, we work with importers, distributors, wholesalers, contractors, procurement managers, and industrial buyers who need clear specifications before placing RFQs. Send us your material grade, size, head type, drive type, application environment, and documentation requirements, and we will help you evaluate the right A2 or A4 stainless steel machine screw option.