S-96640A336 4-40 x 3/8" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and reducing maintenance costs.
• High tensile strength of 80,000 psi ensures reliable fastening under heavy loads, minimizing failure risks in industrial applications.
• Rockwell B80 hardness provides excellent durability and wear resistance, extending the screw's service life.
• Fully threaded design with Class 2A fit offers consistent grip and easy installation, saving time during assembly.
• Standard 100° countersink angle and flat head allows for flush mounting, enhancing aesthetics and safety in finished products.
• Phillips No. 1 drive enables secure tool engagement, reducing slippage and improving installation efficiency.
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met for global industrial use.

Professional Applications & Engineering Value

These 4-40 UNC flat head screws are engineered to address common industrial challenges, such as corrosion and mechanical stress. The Black-Oxide 18-8 Stainless Steel material provides superior resistance to rust and oxidation, making them ideal for applications in electronics, machinery, and outdoor equipment where moisture is a concern. With a coarse UNC thread and fully threaded design, they ensure quick, secure fastening in various substrates, reducing assembly time and improving productivity. The flat head with a 100° countersink angle allows for a smooth, flush finish, preventing snagging and enhancing safety in high-traffic areas. By meeting stringent standards like ASME B18.6.3, these screws deliver consistent performance, minimizing downtime and maintenance costs in demanding environments.

Specification Summary & Compliance

This screw features precise Class 2A thread fit with UNC coarse threads for reliable engagement and ease of use. It adheres to ASME B18.6.3 manufacturing specifications, ensuring dimensional accuracy and interoperability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it is free from hazardous substances and suitable for environmentally conscious industrial applications.