S-92703A205 4-40 x 1/4" ASME B18.3 Stainless Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ensuring long-term reliability in harsh environments.
• Enhanced torque transmission and reduced cam-out thanks to the Torx Plus IP8 drive, providing secure fastening and minimizing tool wear.
• High mechanical strength with 60,000 psi tensile strength and Rockwell B70 hardness, offering dependable performance under load.
• Precise thread engagement with Class 2A thread fit and UNC coarse threading, ensuring easy installation and consistent holding power.
• Flush mounting capability due to the standard flat head with 82° countersink, ideal for applications requiring a smooth surface finish.
• Full threading for maximum grip across the entire 1/4" length, providing uniform clamping force in various materials.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.

Professional Applications & Engineering Value

These 4-40 UNC flat head screws are engineered to address common industrial challenges such as vibration loosening and corrosion-induced failure. The 18-8 Stainless Steel construction, combined with a passivated finish, provides exceptional resistance to moisture and chemicals, making them ideal for electronics enclosures, automotive assemblies, and marine equipment. The Torx Plus IP8 drive ensures high torque transfer with minimal slippage, reducing installation time and preventing damage to the fastener. With a coarse thread spacing and fully threaded design, they offer quick insertion and reliable retention in plastic, metal, or composite substrates, streamlining production while maintaining ASME B18.3 specifications for consistent quality.

Specification Summary & Compliance

This product features precise Class 2A thread fit per UNC standards, with a thread size of 4-40 and length of 1/4 inch. It complies with ASME B18.3 for dimensional accuracy and mechanical properties, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. The 82° countersink angle and right-hand thread direction ensure compatibility with standard industrial designs.