S-96640A057 4-40 x 7/16" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and long-term reliability.
- High tensile strength of 80,000 psi ensures secure, durable fastening under demanding mechanical loads.
- Rockwell B80 hardness provides excellent wear resistance and reduces thread stripping during installation.
- Fully threaded design offers maximum grip and uniform clamping force across the entire length.
- Standard 82° countersink angle allows for flush mounting, minimizing protrusion and improving aesthetics.
- Class 2A thread fit with UNC coarse threading enables quick, easy assembly and reliable engagement in various materials.
- Phillips No. 1 drive facilitates efficient installation with common tools, reducing assembly time.
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address critical industrial challenges, such as corrosion in humid or chemical-exposed settings. The Black-Oxide 18-8 Stainless Steel construction provides a protective layer that enhances durability while maintaining corrosion resistance, making them suitable for electronics, machinery, and outdoor equipment. The fully threaded design ensures consistent load distribution, preventing loosening under vibration. With an 82° countersink angle, they sit flush in pre-drilled holes, reducing aerodynamic drag and improving safety in assemblies. Ideal for applications requiring high-strength fasteners that comply with strict industry standards, these screws deliver reliable performance in automotive, aerospace, and manufacturing sectors where precision and longevity are paramount.
Specification Summary & Compliance
This product adheres to precise dimensional tolerances, including Class 2A thread fit and UNC coarse thread specifications per ASME B18.6.3. It meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and material integrity. The manufacturing process follows standardized guidelines for consistent quality and performance.
