S-90939A115 4-40 x 3/4" Stainless Steel Button Head Torx Screws
Stainless Steel Button Head Torx Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress applications and prevents fastener failure.
- Superior corrosion resistance from A286 Stainless Steel material provides long-term durability in harsh industrial environments.
- Enhanced torque transmission with the Torx T10 drive reduces cam-out risk and allows for higher tightening forces.
- Precise Class 2A thread fit guarantees easy assembly and consistent performance with standard UNC coarse threads.
- Full threading along the 3/4" length offers maximum grip and holding power across the entire fastener.
- Rounded button head design provides a low-profile, finished appearance while minimizing snagging.
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global supply chain requirements.
Professional Applications & Engineering Value
These 4-40 UNC A286 Stainless Steel Rounded Head Screws are engineered to address critical challenges in precision assemblies. The A286 material grade combines high Rockwell C24 hardness with excellent oxidation resistance, making these Torx drive screws ideal for aerospace, automotive, and electronics applications where thermal stability and strength are paramount. The coarse UNC thread and Class 2A fit facilitate quick installation in blind holes and reduce cross-threading risks. With a T10 drive, they ensure secure fastening in vibration-prone environments, while the rounded head profile offers a sleek, non-interfering finish for streamlined designs.
Specification Summary & Compliance
This product adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring the exclusion of hazardous substances. The screws feature a right-hand thread direction, fully threaded 3/4" length, and are manufactured to deliver reliable performance under specified mechanical properties.
