S-91355A159 6-32 x 1/4" Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Corrosion-resistant Black-Oxide finish on alloy steel provides enhanced durability and longevity, protecting against rust in various industrial environments.
• Class 3A thread fit guarantees precise, tight-tolerance threading for secure, vibration-resistant assemblies that maintain integrity over time.
• Flanged design with a wide rounded button head distributes clamping force evenly, minimizing surface damage and simplifying alignment during installation.
• Hex drive compatibility (5/64") allows for easy, high-torque installation with standard tools, speeding up assembly processes and reducing labor time.
• Fully threaded coarse UNC pattern enables quick engagement and strong holding power in a variety of materials, improving efficiency in high-volume production.
• Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory adherence, making these screws suitable for global supply chains and sensitive industries.

Professional Applications & Engineering Value

These 6-32 UNC coarse thread rounded head screws are engineered to address common industrial challenges, such as vibration loosening and corrosion in harsh environments. The Black-Oxide alloy steel construction, combined with a Rockwell C32 hardness, provides superior resistance to wear and environmental factors, ensuring long-term reliability in applications like machinery assembly, electronics enclosures, and automotive components. The flanged design and fully threaded body enhance grip and distribution of load, reducing the need for additional washers and simplifying maintenance. Ideal for precision screw uses, this fastener supports efficient, repeatable installations while meeting strict industry standards for performance and safety.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 3A thread fit for high precision and consistent engagement. Dimensions include a 1/4" length, 0.138" thread diameter, and 0.297" flange diameter, ensuring accurate fit in designated assemblies. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and health safety without hazardous substances.