S-90484A261 10-32 x 3/4" ASME B18.3, ASTM F835 Tamper-Resistant Hex-Drive Steel Button Head Screws

Key Features & Benefits at a Glance

• Tamper-resistant security with a specialized 5/32" hex drive that deters unauthorized removal in public or high-security installations.
• Exceptional durability and corrosion resistance provided by the Black-Oxide finish on Alloy Steel, extending service life in harsh environments.
• Superior load-bearing capacity from a high 130,000 psi tensile strength and Rockwell C39 hardness, ensuring reliable performance under stress.
• Precise, secure fastening with a Class 3A UNF fine thread fit, minimizing the risk of loosening in vibration-prone applications.
• Maximum thread engagement due to the fully threaded design, offering consistent clamping force along the entire 3/4" length.
• Streamlined installation with a standard rounded (button) head profile that sits flush and reduces snagging.
• Broad industry compliance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety.

Professional Applications & Engineering Value

This 10-32 UNF Class 3A screw is engineered for applications where security, precision, and environmental resilience are non-negotiable. The Black-Oxide Alloy Steel construction provides a robust barrier against oxidation and wear, making it ideal for outdoor equipment, electronic enclosures, and machinery exposed to moisture or chemicals. The tamper-resistant hex drive is critical in public infrastructure, transportation, and secure facilities to prevent vandalism or unauthorized access. Its fine thread spacing and Class 3A fit ensure a tight, vibration-resistant connection in assemblies requiring high repeatability and minimal backlash. Fully threaded for uniform stress distribution, this rounded head screw delivers reliable performance in automated manufacturing, telecommunications, and heavy-duty industrial systems.

Specification Summary & Compliance

This screw features a 10-32 UNF thread with a Class 3A tolerance for precise fit, a right-hand thread direction, and fine thread spacing. It is manufactured in compliance with ASME B18.3 specifications and adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free of restricted hazardous substances and safe for use in regulated industries.