S-90939A113 4-40 x 3/8" Stainless Steel Button Head Torx Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from A286 Stainless Steel material prolongs service life in harsh or outdoor environments.
• Precise Class 2A thread fit provides consistent engagement and reduces cross-threading during assembly, improving installation efficiency.
• Secure T10 Torx drive offers enhanced torque transmission and minimizes cam-out, protecting the screw head and tool.
• Fully threaded design along the 3/8" length ensures maximum grip and uniform load distribution across the fastened components.
• Rounded button head profile delivers a low-profile, finished appearance while reducing snagging risks in assembled products.
• Compliance with RoHS 3 and REACH standards assures environmental safety and regulatory acceptance for global supply chains.

Professional Applications & Engineering Value

These 4-40 UNC T10 Torx A286 Stainless Steel Rounded Head Screws are engineered to address critical challenges in precision assemblies, such as aerospace, electronics, and automotive subsystems. The A286 Stainless Steel composition provides outstanding resistance to oxidation and high-temperature creep, making these screws ideal for environments where both mechanical strength and long-term durability are non-negotiable. The coarse thread spacing and fully threaded design ensure rapid installation and robust clamping force in materials prone to vibration loosening. With a Rockwell C24 hardness and 130,000 psi tensile strength, these fasteners prevent stripping and deformation under dynamic loads, offering engineers a dependable solution for mission-critical applications that demand repeatable performance and minimal maintenance.

Specification Summary & Compliance

This product adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Manufactured from A286 Stainless Steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. The screw features a right-hand thread direction, coarse thread spacing, and a 3/8" length, fully threaded for uniform stress distribution. These specifications confirm its suitability for high-performance industrial and electronic assemblies requiring reliable, corrosion-resistant fastening solutions.