S-92703A211 4-40 x 1/2" ASME B18.3 Stainless Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Enhanced torque transmission and reduced cam-out thanks to the Torx Plus IP8 drive system for secure, efficient installation
• Reliable high-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Precise, secure fastening ensured by Class 2A thread fit and fully threaded design for maximum grip and vibration resistance
• Flush, professional installation with standard 82° countersink angle and flat head profile for smooth surfaces
• Broad compatibility with UNC coarse threading and right-hand direction for common assembly requirements
• Regulatory peace of mind with compliance to ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

Engineered for precision and durability, these 4-40 UNC flat head screws address critical industrial fastening challenges. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to corrosion and oxidation, making them suitable for machinery, electronics, and outdoor equipment exposed to moisture or chemicals. The Torx Plus IP8 drive minimizes tool slippage and wear, ensuring consistent torque application in high-volume assembly lines. With a Class 2A thread fit and coarse thread spacing, these screws offer quick installation and reliable hold in metals and plastics, reducing the risk of stripping. The 82° countersink angle allows for a seamless finish in countersunk holes, ideal for applications where a flat surface is essential, such as aerospace components, automotive panels, and industrial enclosures.

Specification Summary & Compliance

This screw features precise Class 2A thread fit per UNC standards, with a thread size of 4-40 and coarse spacing for optimal engagement. Manufacturing adheres to ASME B18.3 specifications, ensuring dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe use in global markets.