S-91900A203 8-32 x 1 1/2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx T15 drive that deters unauthorized removal, ideal for public or high-security installations
• Superior corrosion protection thanks to the passivated finish on 18-8 Stainless Steel, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness, providing reliable performance under heavy loads
• Precise, secure fastening achieved through Class 3A thread fit and UNC coarse spacing, reducing the risk of loosening in vibrating applications
• Full-thread engagement along the 1-1/2" length for maximum grip and load distribution in assembled components
• Broad regulatory compliance including ASME B18.3 standards, RoHS 3, and REACH, ensuring suitability for regulated industrial and commercial uses
• Low-profile rounded button head design that minimizes snagging while providing a finished appearance in visible applications

Professional Applications & Engineering Value

Engineered for demanding environments, these 8-32 UNC threaded screws in 18-8 Stainless Steel address critical needs in industrial and security applications. The tamper-resistant Torx T15 drive prevents vandalism and unauthorized access in public infrastructure, machinery guards, and electronic enclosures. With a passivated finish, the fastener resists oxidation and chemical exposure, extending service life in outdoor or corrosive settings. The Class 3A thread fit and coarse spacing ensure quick assembly and vibration resistance, reducing maintenance in machinery and transportation equipment. Fully threaded for consistent clamping force, these rounded head screws are indispensable where security, durability, and compliance are non-negotiable.

Specification Summary & Compliance

This screw meets ASME B18.3 specifications for dimensional accuracy, with a Class 3A thread fit for precise engagement. Threading follows UNC coarse spacing with right-hand direction, and the passivated finish on 18-8 Stainless Steel enhances corrosion resistance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted substances for industrial and international use.