S-91781A305 12-24 x 3" ASME B18.6.3 Stainless Steel Slotted 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
• Exceptional tensile strength rated at 80,000 psi for reliable performance in demanding applications
• Precision thread engagement with Class 2A fit and UNC coarse threads ensuring secure fastening and easy installation
• Optimized flush mounting with standard 82° countersink angle and flat head design for smooth surface finishing
• Enhanced durability with Rockwell B80 hardness providing excellent wear resistance and long service life
• Versatile partial threading allowing for both clamping and alignment functions in various assembly scenarios
• Broad compliance coverage meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 12-24 UNC flat head screws deliver exceptional engineering value through their 18-8 stainless steel composition and passivated finish, specifically engineered to combat corrosion in demanding industrial environments. The partially threaded design provides optimal clamping force distribution while the 82° countersink angle ensures flush mounting in precision applications. With coarse UNC threading and Class 2A thread fit, these screws offer superior engagement in various materials while resisting vibration-induced loosening. Ideal for machinery assembly, electrical enclosures, and structural frameworks, these flat head screws solve critical fastening challenges where surface finish integrity and reliable performance under stress are paramount requirements.

Specification Summary & Compliance

This 3" long flat head screw features precise Class 2A thread fit with 12-24 UNC coarse threading and partial threading up to 1½". Manufactured to exacting ASME B18.6.3 specifications, it maintains dimensional accuracy with 0.412" head diameter and standard flat head profile. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets while delivering consistent 80,000 psi tensile strength performance.