S-91781A289 12-24 x 3/8" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-term reliability in harsh environments
• Superior holding power with 80,000 psi tensile strength and Rockwell B80 hardness for demanding industrial applications
• Precise flush installation featuring 82° countersink angle and undercut flat head profile for seamless surface finishing
• Reliable coarse threading with UNC thread form and Class 2A fit ensuring consistent engagement and vibration resistance
• Full-threaded design providing maximum grip length and load distribution across the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

These 12-24 UNC flat head screws deliver critical performance advantages for industrial assembly applications where surface flushness and corrosion resistance are paramount. The 18-8 stainless steel construction combined with passivated finish provides exceptional protection against oxidation and chemical exposure, making them ideal for marine equipment, food processing machinery, and outdoor installations. The undercut flat head profile with 82° countersink angle ensures precise seating without surface protrusion, while the coarse UNC threading offers superior resistance to vibration loosening in high-stress environments. The fully threaded design maximizes contact area for enhanced load distribution, making these industrial screws particularly valuable in applications requiring consistent clamping force across the entire fastener length.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards, these flat head screws feature precise Class 2A thread fit for consistent installation performance. The UNC coarse thread form with 12-24 designation ensures reliable engagement in various materials. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and chemical safety. The slotted drive style provides traditional installation compatibility while maintaining the mechanical properties required for industrial fastening applications.