S-94063A294 12-24 x 3/4" ASME B18.6.3 Tamper-Resistant Drilled Spanner Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
• Superior torque transmission and tamper resistance via the drilled spanner drive (No. 12 size), ideal for secure assemblies requiring high tightening force.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness, preventing stripping and deformation under load.
• Reliable coarse threading (12-24 UNC) with Class 2A fit for quick installation and vibration resistance in demanding applications.
• Optimized flush mounting thanks to the standard 82° countersink angle and flat head design, reducing protrusion and improving aesthetics.
• Full threading along the 3/4" length ensures consistent grip and load distribution across the entire fastened joint.
• Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.

Professional Applications & Engineering Value

This 12-24 UNC flat head screw is engineered from 18-8 stainless steel to address common industrial challenges such as corrosion, high stress, and assembly efficiency. The drilled spanner drive allows for high-torque applications without cam-out, making it suitable for machinery, automotive, and electrical enclosures where space is constrained and a flush finish is critical. Its coarse thread design facilitates faster installation and provides better resistance to loosening under vibration, while the fully threaded body ensures uniform clamping force. Ideal for OEMs and maintenance teams, this screw delivers dependable performance in environments exposed to moisture, chemicals, or dynamic loads, reducing downtime and replacement costs.

Specification Summary & Compliance

The screw adheres to Class 2A thread fit tolerances per UNC standards, ensuring precise engagement and interchangeability. Manufacturing and dimensional compliance are verified under ASME B18.6.3, while environmental safety is maintained through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. Key dimensions include a 0.412" head diameter, 3/4" length, and 82° countersink angle, all controlled to support consistent performance in industrial fastening systems.