S-91255A273 10-32 x 1" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by the Black-Oxide finish on Alloy Steel, extending service life in demanding industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections with minimal play, enhancing assembly integrity.
• Hex drive compatibility allows for easy installation and high torque application with standard tools, speeding up assembly processes.
• Fully threaded design with UNF fine spacing ensures maximum grip and uniform load distribution along the entire length.
• High hardness (Rockwell C39) provides excellent wear resistance, maintaining thread integrity through repeated use.
• Compliance with major standards including ASME B18.3 and ASTM F835 ensures consistent quality and interchangeability in regulated industries.

Professional Applications & Engineering Value

These 10-32 UNF Class 3A Black-Oxide Alloy Steel rounded head screws are engineered to address critical challenges in precision assembly and heavy-duty applications. The fine thread spacing and Class 3A fit provide superior vibration resistance, preventing loosening in machinery and equipment subjected to dynamic loads. The Black-Oxide surface treatment on Alloy Steel offers enhanced corrosion protection without compromising dimensional accuracy, making these hex drive screws ideal for automotive, aerospace, and industrial manufacturing where environmental factors and strict tolerances are concerns. The combination of 120,000 psi tensile strength and Rockwell C39 hardness ensures these fully threaded screws maintain clamp force under extreme conditions, reducing maintenance frequency and improving operational reliability in right-hand thread applications.

Specification Summary & Compliance

This 1" length screw features 10-32 UNF fine threads with Class 3A precision tolerance for secure fitment. Manufacturing adheres to ASME B18.3 and ASTM F835 specifications, ensuring dimensional consistency and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material restrictions adherence for global industrial use.