S-94063A201 8-32 x 1 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 construction and passivated finish, ideal for harsh industrial environments.
• High mechanical strength and durability offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term fastening.
• Secure and tamper-resistant installation via the drilled spanner drive, preventing slipping and ensuring precise torque application.
• Optimal flush mounting with an 82° countersink angle and flat head design, reducing protrusion and improving aesthetic finish.
• Consistent and reliable threading with UNC coarse threads and Class 2A fit, enabling quick assembly and vibration resistance.
• Full threading along the 1 1/4" length provides maximum grip and load distribution across the entire fastened joint.
• Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.

Professional Applications & Engineering Value

This 8-32 UNC flat head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and the need for secure, flush fastening. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to rust and chemical exposure, making it suitable for machinery, electrical enclosures, and outdoor equipment. The drilled spanner drive ensures tamper-resistant installation, which is critical in public infrastructure or high-security applications. With coarse UNC threads and a Class 2A thread fit, these screws facilitate rapid assembly while maintaining strong holding power, reducing downtime in production lines. Fully threaded along its length, it ensures uniform stress distribution, preventing joint failure in dynamic loads. Ideal for OEM manufacturing, maintenance, and repair operations, this screw delivers reliability and compliance with stringent industrial specifications.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including a head diameter tolerance of -0.02" to 0.02" and a Class 2A thread fit per UNC standards, ensuring consistent performance and interchangeability. It is manufactured in compliance with ASME B18.6.3 for mechanical and dimensional integrity. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmentally responsible procurement.