S-94414A384 5/16"-18 x 1 1/2" ASME B18.3, ASTM F835 Alloy Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish for extended service life in harsh industrial environments
• Exceptional torque transmission through Torx Plus IP40 drive system, reducing cam-out and tool wear
• High-strength performance with 140,000 psi tensile strength and Rockwell C39 hardness for demanding applications
• Precise thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance
• Optimal countersinking with 82° flat head profile for flush mounting and clean aesthetic finish
• Maximum thread coverage through full threading along the 1-1/2" length for superior holding power
• Broad compatibility with UNC coarse threading system for versatile industrial applications

Professional Applications & Engineering Value

These black-oxide alloy steel flat head screws deliver exceptional engineering value in demanding industrial settings where corrosion resistance and high-strength fastening are critical. The Torx Plus IP40 drive system eliminates common installation issues like cam-out, ensuring secure torque transmission even in high-vibration environments. The Class 3A thread fit provides precise tolerance control, preventing loosening under dynamic loads while the 82° countersink angle creates seamless surface integration. Ideal for machinery assembly, automotive components, and heavy equipment manufacturing, these fully threaded screws maintain structural integrity while meeting rigorous industry standards for performance and reliability.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse threading (5/16"-18). Compliant with ASME B18.3 specifications where identified as ASTM F835, ensuring dimensional accuracy and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. The black-oxide surface treatment enhances corrosion protection while maintaining dimensional stability across the 1-1/2" length and 0.656" head diameter configuration.