S-94063A315 8-32 x 1/4" 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 and passivated finish, ideal for harsh industrial environments.
• Secure, tamper-resistant installation using the drilled spanner drive, preventing slippage and ensuring precise torque application.
• Reliable thread engagement with fully threaded UNC coarse threads and Class 2A fit, providing consistent clamping force and vibration resistance.
• Flush, professional finish due to the flat head with undercut and 82° countersink angle, minimizing protrusion in assembled components.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for durable, long-lasting fastening under load.
• Broad industry compliance meeting ASME B18.6.3 specifications, RoHS 3, and REACH standards for safe, reliable use in regulated applications.
• Easy identification and handling with standard 8-32 thread size and 1/4" length, streamlining inventory and assembly processes.

Professional Applications & Engineering Value

This 8-32 UNC Flat Head Spanner Screw is engineered to address critical challenges in precision assembly and maintenance. The 18-8 Stainless Steel construction, enhanced by a passivated finish, delivers exceptional corrosion resistance, making it suitable for applications in electronics, machinery, and outdoor equipment where moisture and chemicals are present. The drilled spanner drive ensures secure tool engagement, reducing the risk of damage during installation in tight spaces. With a fully threaded coarse thread design and Class 2A thread fit, it provides reliable fastening in materials prone to vibration, such as metal housings and plastic components. The flat head with undercut and 82° countersink angle allows for a smooth, flush fit, preventing interference in aerodynamic or aesthetic-critical designs. Ideal for industrial fasteners requiring high tensile strength and compliance, this screw supports efficient production and reduces downtime.

Specification Summary & Compliance

This screw features precise dimensions, including a head diameter of 0.312" with tolerance from -0.02" to 0", and a length of 1/4". Thread specifications include 8-32 UNC coarse threads with a Class 2A thread fit for consistent accuracy. It complies with ASME B18.6.3 manufacturing standards, ensuring reliability in mechanical applications. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations in global markets.