Metric Sizes A4 Stainless Steel Socket Head Cap Screw

Metric A4 Stainless Steel Socket Head Cap Screws for Superior Corrosion Resistance

Metric A4 stainless steel socket head cap screws are premium corrosion-resistant fasteners engineered for demanding industrial, marine, and chemical environments. Featuring a cylindrical head and internal hex (Allen) drive, these metric fasteners provide high clamping force while allowing installation in tight or counterbored spaces. When strength and long-term corrosion protection are critical, A4 stainless socket head cap screws deliver reliable performance.

A4 stainless steel is commonly equivalent to 316 stainless steel and contains molybdenum for enhanced resistance to chlorides, saltwater, and aggressive chemicals. This makes A4 socket head cap screws ideal for harsh outdoor and coastal applications.

Metric Size Availability

Metric A4 stainless steel socket head cap screws are available in a wide range of DIN and ISO configurations, including DIN 912 / ISO 4762 standards.

Common metric sizes include:

• M3 through M30 diameters

• Standard coarse thread pitch

• Various standard and custom lengths

These precision metric fasteners ensure consistent thread fit, accurate head dimensions, and reliable torque performance in mechanical assemblies.

A4 (316) Stainless Steel Properties

Exceptional Corrosion Resistance

A4 stainless steel offers superior protection against pitting, crevice corrosion, and oxidation compared to A2 (304) stainless steel. It is specifically designed for environments exposed to moisture, salt spray, and chemical washdowns.

Key material advantages include:

• High resistance to saltwater and marine atmospheres

• Excellent performance in food processing and pharmaceutical facilities

• Non-rusting, clean finish

• Strong mechanical properties for medium to high-load applications

Industrial and Marine Applications

Metric A4 stainless steel socket head cap screws are widely used in:

• Marine hardware and dock systems

• Water treatment facilities

• Chemical processing plants

• Food-grade machinery

• Outdoor structural assemblies

The internal hex drive allows for higher torque application and secure clamping in compact spaces.

Why Choose Metric A4 Socket Head Cap Screws?

• Superior corrosion resistance in harsh environments

• Precision metric sizing for global compatibility

• High-strength fastening performance

• Long service life with minimal maintenance

For corrosion-critical metric fastening, A4 stainless steel socket head cap screws provide durability, reliability, and professional-grade performance.