S-91099A474 12-24 x 5/8" 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 fastening under high-stress conditions
• Precise Class 2A thread fit guarantees smooth installation and secure connections
• Optimized 82° countersink angle with undercut head provides flush seating and reduced risk of material splitting
• Full threading and coarse UNC pattern delivers maximum grip and faster assembly in various materials
• Phillips #3 drive compatibility enables efficient installation with standard tools
• Comprehensive regulatory compliance meets ASME B18.6.3, RoHS 3, and REACH standards for global applications

Professional Applications & Engineering Value

These 12-24 UNC flat head screws in passivated 18-8 stainless steel address critical industrial fastening challenges where corrosion resistance and structural integrity are paramount. The undercut flat head design with 82° countersink prevents surface protrusion in precision assemblies, while the coarse thread configuration ensures rapid installation in metal, plastic, and composite materials. Engineered with Rockwell B80 hardness and 80,000 PSI tensile strength, they maintain clamping force in vibrating machinery, electrical enclosures, and automotive components. The Phillips #3 drive offers widespread tool compatibility, reducing installation time in high-volume manufacturing and maintenance operations.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread tolerances for consistent fit. Features 5/8" length, right-hand UNC threads, and full threading for maximum engagement. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in restricted substance-sensitive applications.