S-98164A537 3/8"-24 x 1" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh chemical and marine environments
• Exceptional thread precision with Class 3A UNF fine threading ensuring secure, vibration-resistant connections in critical assemblies
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Optimized installation efficiency featuring hex drive design with 7/32" drive size for secure tool engagement and reduced slipping
• Full-threaded design providing maximum grip length and uniform stress distribution across the entire fastener
• Rounded button head profile delivering a low-profile, finished appearance while minimizing snagging hazards
• Regulatory compliance assurance meeting ASME B18.3, ASTM F879, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw with UNF Class 3A fine threading addresses critical challenges in precision engineering and industrial maintenance. The combination of passivated finish and marine-grade stainless steel provides exceptional protection against chloride-induced stress corrosion cracking, making it ideal for chemical processing equipment, marine hardware, and food processing machinery. The fine thread pitch ensures superior resistance to vibrational loosening in dynamic applications, while the hex drive configuration allows for high-torque installation without cam-out issues. These fully threaded fasteners maintain consistent clamping force across the entire engagement length, preventing joint failure in high-stress assemblies where reliability is paramount.

Specification Summary & Compliance

This precision fastener maintains Class 3A thread fit tolerances per UNF specifications with 3/8"-24 fine threading and 1" length. Manufacturing complies with ASME B18.3 dimensional standards and ASTM F879 material specifications. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility in industrial applications.