S-90939A112 4-40 x 1/4" Stainless Steel Button Head Torx Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi provides superior resistance to mechanical stress and prevents fastener failure in demanding applications
• A286 stainless steel construction delivers excellent corrosion resistance and maintains mechanical properties at elevated temperatures
• T10 Torx drive system ensures secure tool engagement with reduced cam-out risk for reliable installation and removal
• Class 2A thread fit with 4-40 UNC coarse spacing enables quick assembly and reliable performance in vibration-prone environments
• Fully threaded design maximizes engagement length for enhanced holding power across the entire fastener length
• RoHS 3 and REACH compliance guarantees environmental responsibility and regulatory adherence for global industrial applications
• Rockwell C24 hardness rating provides optimal balance between strength and ductility for long-term fastener integrity

Professional Applications & Engineering Value

These A286 stainless steel rounded head screws deliver critical performance advantages in aerospace, defense, and high-temperature industrial applications where reliability is non-negotiable. The premium A286 alloy maintains exceptional tensile strength and corrosion resistance even when exposed to elevated temperatures up to 1300°F (704°C), solving thermal degradation concerns common in standard stainless fasteners. The T10 Torx drive addresses installation challenges in confined spaces by providing superior torque transmission while minimizing tool slippage. With 4-40 UNC coarse threading and Class 2A fit, these screws ensure rapid assembly without compromising joint security, making them ideal for vibration-resistant connections in critical assemblies where fastener integrity directly impacts system performance and safety.

Specification Summary & Compliance

This fastener features precision 4-40 UNC coarse threads with Class 2A thread fit tolerances, ensuring consistent engagement and reliable performance. Manufacturing adheres to strict quality standards with fully threaded right-hand configuration and dimensional accuracy including 1/4" length, 0.213" head diameter, and T10 Torx drive specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety requirements for industrial components. Material certification includes Rockwell C24 hardness and 130,000 psi tensile strength verification for quality assurance.