S-94063A203 8-32 x 1 1/2" ASME B18.6.3 Tamper-Resistant Drilled Spanner Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for dependable load-bearing in demanding applications.
• Secure and flush installation thanks to the flat head design with 82° countersink angle, ideal for surfaces requiring a smooth finish.
• Easy installation and removal with drilled spanner drive, providing a reliable grip and reducing tool slippage during assembly.
• Precise thread engagement with UNC coarse threads and Class 2A fit, ensuring consistent performance and reducing cross-threading risks.
• Full threading along the 1 1/2" length for maximum grip and adjustability in various material thicknesses.
• Compliance with industry standards including ASME B18.6.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.

Professional Applications & Engineering Value

Engineered for industrial and mechanical assemblies, these 8-32 UNC flat head screws provide a robust fastening solution where durability and corrosion resistance are critical. The 18-8 stainless steel material combined with a passivated finish significantly enhances resistance to oxidation and chemical exposure, making them ideal for applications in marine, chemical processing, and outdoor equipment. The drilled spanner drive ensures secure torque application, minimizing damage to the screw head and reducing assembly time. With a coarse UNC thread and Class 2A thread fit, these screws offer quick installation and reliable holding power in metals, plastics, and composite materials, addressing common issues like vibration loosening and material fatigue in high-stress environments.

Specification Summary & Compliance

This product features precise dimensional tolerances, including a head diameter tolerance of -0.02" to 0.02" and Class 2A thread fit for consistent performance. It adheres to ASME B18.6.3 specifications for mechanical and dimensional requirements, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance-free composition.