S-91099A415 12-24 x 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional 80,000 PSI tensile strength ensures reliable performance under high-stress applications
• Precise Class 2A thread fit guarantees smooth installation and secure fastening in UNC coarse thread applications
• Undercut flat head design provides flush seating and reduced risk of surface damage during tightening
• Optimized Phillips No. 3 drive offers efficient torque transfer and reduced cam-out during installation
• Full threading along the 1/2" length enables maximum grip and adjustment flexibility in assembled components
• 82° countersink angle ensures proper alignment and clean finish in countersunk holes

Professional Applications & Engineering Value

These 12-24 UNC flat head screws deliver critical engineering solutions where corrosion resistance and high tensile strength are paramount. Manufactured from passivated 18-8 stainless steel, they prevent rust and chemical degradation in demanding environments like marine equipment, food processing machinery, and outdoor structures. The undercut flat head profile and 82° countersink angle eliminate protrusion issues while the coarse UNC threads provide rapid installation in soft materials and plastics. With fully threaded design and Phillips No. 3 drive, they ensure maximum engagement and efficient assembly in high-volume production lines, reducing installation time and maintenance costs.

Specification Summary & Compliance

This screw maintains Class 2A thread fit per UNC standards with 1/2" length and coarse thread spacing. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental and safety regulations for industrial use.