S-90939A143 1/4"-20 x 1 1/2" 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.
• A286 Stainless Steel construction offers superior corrosion resistance and maintains strength at elevated temperatures, extending service life.
• T30 Torx drive system provides superior torque transmission and reduces cam-out, allowing for precise installation and minimizing tool wear.
• Class 2A thread fit with coarse UNC threads ensures easy, rapid assembly and reliable engagement in a wide range of materials.
• Fully threaded design maximizes grip and holding power along the entire length, providing consistent clamping force.
• Rounded button head profile offers a low-profile, finished appearance while reducing stress concentration points.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and unrestricted use in regulated industries.

Professional Applications & Engineering Value

These 1/4-20 UNC T30 Torx rounded head screws are engineered for demanding environments where reliability is non-negotiable. The A286 stainless steel material provides excellent resistance to oxidation and creep, making these fasteners ideal for aerospace, automotive, and heavy machinery applications exposed to high temperatures and corrosive elements. The coarse thread and Class 2A fit facilitate quick assembly in softer materials or where vibration resistance is critical. The T30 drive eliminates the stripping issues common with Phillips or slotted drives, ensuring secure fastening in high-torque scenarios. This combination of high tensile strength and durable surface integrity solves common failure points, providing long-term operational stability and reducing maintenance frequency.

Specification Summary & Compliance

This product adheres to UNC coarse thread standards with a Class 2A thread fit for consistent, reliable engagement. Manufacturing and material specifications ensure dimensional accuracy for the 1/4"-20 thread size and 1 1/2" length. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industrial markets.