S-91255A546 1/4"-20 x 1 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional Durability – Black-oxide alloy steel construction with Rockwell C39 hardness and 120,000 psi tensile strength ensures long-lasting performance in demanding environments.
• Superior Thread Engagement – Class 3A thread fit provides precise, reliable fastening with minimal risk of cross-threading or loosening.
• Effortless Installation – Hex drive design with 5/32" drive size allows for quick, secure tightening using standard tools.
• Optimized Load Distribution – Rounded button head profile reduces surface pressure and minimizes the risk of material damage.
• Wide Compatibility – UNC coarse threading (1/4"-20) and fully threaded shank ensure versatile use across various industrial applications.
• Corrosion Resistance – Black-oxide surface treatment enhances protection against rust and wear in harsh conditions.
• Regulatory Assurance – Compliant with ASME B18.3, ASTM F835, RoHS 3, and REACH standards for safe, reliable industrial use.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these black-oxide alloy steel button head screws deliver exceptional strength and reliability in machinery assembly, automotive components, and structural frameworks. The fully threaded UNC coarse spacing with Class 3A fit ensures secure fastening in high-vibration environments, reducing maintenance needs. The hex drive design facilitates easy installation in confined spaces, while the rounded head profile minimizes stress concentration on connected materials. Ideal for use in equipment requiring 120,000 psi tensile strength and corrosion resistance, these screws address critical challenges in load-bearing and harsh operational settings, enhancing overall system longevity and safety.

Specification Summary & Compliance

This screw features precise Class 3A thread fit and UNC coarse threading (1/4"-20) with a length of 1-1/2". Manufactured to ASME B18.3 and ASTM F835 specifications, it ensures dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and adherence to global industrial standards.