S-90939A139 1/4"-20 x 1/2" 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 under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance from A286 stainless steel material extends service life in harsh industrial environments.
- Enhanced torque transmission with T30 Torx drive minimizes cam-out and tool slippage for secure, efficient installations.
- Maximum holding power provided by fully threaded 1/4"-20 UNC coarse spacing design improves grip and vibration resistance.
- Consistent thread engagement due to Class 2A fit tolerance ensures precise assembly and reduces cross-threading risks.
- Compliance with RoHS 3 and REACH regulations guarantees environmental safety and suitability for regulated industries.
- Rounded button head profile offers a low-profile, aesthetically pleasing finish while minimizing snagging hazards.
Professional Applications & Engineering Value
These A286 stainless steel rounded head screws are engineered to address critical challenges in demanding applications such as aerospace, automotive, and heavy machinery. The T30 Torx drive delivers superior torque control, preventing damage during high-torque assembly and disassembly cycles. With a Rockwell C24 hardness and 130,000 psi tensile strength, they withstand extreme mechanical stresses and vibrations without compromising integrity. The fully threaded 1/4"-20 UNC coarse spacing ensures rapid installation and robust clamping force, ideal for components requiring secure fastening in corrosive or high-temperature environments. This combination of high-strength fasteners with regulatory compliance makes them a reliable choice for engineers prioritizing durability and safety.
Specification Summary & Compliance
This rounded head screw features a 1/4"-20 UNC thread with Class 2A fit for precise dimensional accuracy and easy assembly. Manufactured from A286 stainless steel with a T30 Torx drive, it meets industry standards for mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements for industrial use.
