S-94063A148 6-32 x 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 and passivated finish, ideal for harsh environments and extended service life.
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and resistance to mechanical failure in demanding applications.
• Precision Class 2A thread fit guarantees smooth installation and secure fastening with consistent performance.
• Drilled spanner drive design provides tamper-resistant security and prevents unauthorized removal in sensitive assemblies.
• Fully threaded UNC coarse thread enables faster installation and improved grip in a variety of materials.
• 82° flat head profile allows for a flush, low-profile finish that minimizes protrusion and snagging risks.
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.

Professional Applications & Engineering Value

These 6-32 UNC flat head spanner screws are engineered to address critical challenges in industrial and precision assembly. The 18-8 stainless steel construction, enhanced by a passivated finish, provides exceptional resistance to corrosion, oxidation, and chemical exposure, making them suitable for outdoor, marine, and chemical processing equipment. The drilled spanner drive offers a secure, tamper-resistant fastening solution for public infrastructure, electronic enclosures, and machinery where vandalism or unauthorized access is a concern. With a Rockwell B70 hardness and 70,000 psi tensile strength, these screws maintain integrity under vibration and dynamic loads, reducing maintenance needs in automotive, aerospace, and heavy machinery applications. The combination of fully threaded coarse UNC threads and precise Class 2A fit ensures quick, reliable installation without cross-threading, enhancing assembly efficiency and long-term reliability.

Specification Summary & Compliance

This screw features a 6-32 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy and ease of assembly. Key dimensions include a 1/2" length, 0.262" head diameter with a tolerance of -0.018" to 0", and an 82° countersink angle. It is manufactured in compliance with ASME B18.6.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence for global industrial use.