S-91255A275 10-32 x 1 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 120,000 psi tensile strength and Rockwell C39 hardness for reliable performance in demanding industrial applications.
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in various environments.
• Precise and secure fastening ensured by the Class 3A thread fit and 10-32 UNF fine thread, minimizing the risk of loosening under vibration.
• Easy installation and removal with the 1/8" hex drive and rounded button head design, allowing for efficient assembly with standard tools.
• Optimized load distribution from the partially threaded shank, reducing material stress and preventing joint failure.
• Broad industry compliance meeting ASME B18.3 and ASTM F835 standards, ensuring consistent quality and interchangeability.
• Environmentally responsible manufacturing with full RoHS 3 and REACH compliance, supporting sustainable procurement practices.

Professional Applications & Engineering Value

These 10-32 UNF rounded head screws are engineered to address critical fastening challenges in industrial settings. The black-oxide alloy steel construction provides excellent resistance to corrosion and wear, making them ideal for machinery, automotive assemblies, and electronic enclosures where exposure to harsh conditions is common. The fine UNF thread and Class 3A fit deliver superior clamping force and vibration resistance, preventing joint failure in high-stress applications. With a 1/8" hex drive and button head profile, installation is quick and tool-accessible, reducing assembly time and labor costs. The partial threading ensures that unthreaded sections bear load effectively, enhancing structural integrity in precision equipment and reducing the need for frequent maintenance or replacements.

Specification Summary & Compliance

This screw features a 10-32 UNF thread with Class 3A fit for high precision and a 1-1/2" length with 7/8" minimum thread length. It is manufactured in accordance with ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental standards for global industrial use.