S-94063A842 10-32 x 2 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, ideal for harsh industrial environments.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term fastening under stress.
• Precision installation and tamper resistance provided by the drilled spanner drive and flat head design for secure, flush-mount applications.
• Accurate thread engagement with a Class 2A thread fit and 10-32 UNF fine thread, ensuring vibration resistance and reduced loosening.
• Optimized for countersunk holes featuring an 82° countersink angle and standard flat head profile for a smooth, professional finish.
• Versatile partial threading on a 2 1/2" length allows for effective clamping where full threading isn't required.
• Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH, guaranteeing quality and regulatory adherence.

Professional Applications & Engineering Value

This 10-32 UNF flat head spanner screw is engineered to address critical challenges in precision machinery, electronics assembly, and automotive components. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to oxidation and chemical exposure, extending service life in demanding conditions. Its partially threaded design and Class 2A thread fit ensure secure fastening with minimal risk of cross-threading, while the drilled spanner drive offers enhanced torque application and tamper resistance. Ideal for applications requiring a flush surface, the flat head and standard profile facilitate seamless integration into countersunk holes, reducing protrusion and improving safety. These features make it a reliable choice for maintaining structural integrity and assembly precision in industrial screws applications.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances and UNF fine thread standards, ensuring dimensional accuracy and compatibility. It meets ASME B18.6.3 specifications for consistent manufacturing quality, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial uses.