S-98164A180 10-32 x 5/8" 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 environments including marine and chemical applications
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high-stress conditions
• Precision thread engagement through Class 3A fine thread fit ensuring secure fastening and vibration resistance in critical assemblies
• Easy installation and removal with hex drive design requiring only 1/8" drive tools for efficient maintenance operations
• Maximum thread engagement with fully threaded design providing consistent clamping force along the entire 5/8" length
• Streamlined profile with rounded button head offering low-clearance installation while maintaining professional appearance
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 10-32 UNF rounded head screw in 316 stainless steel addresses critical challenges in industrial fastening where corrosion resistance and thread precision are paramount. The combination of passivated finish and marine-grade stainless steel provides exceptional protection against chloride-induced stress corrosion cracking, making it ideal for offshore equipment, chemical processing systems, and food processing machinery. The Class 3A thread fit with fine threading ensures minimal backlash and superior vibration resistance in precision instruments, electronic enclosures, and automotive components. The hex drive configuration with rounded button head profile facilitates installation in confined spaces while maintaining structural integrity under 70,000 psi tensile loads, delivering reliable performance in demanding mechanical assemblies.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit per UNF specifications, ensuring precise dimensional accuracy and interchangeability. Complies with ASME B18.3 mechanical standards, RoHS 3 (2015/863/EU) for hazardous substance restriction, and REACH (EC 1907/2006) regulations for chemical safety. The 316 stainless steel construction with passivated finish provides enhanced surface protection while maintaining full thread integrity throughout the 5/8" length with 10-32 UNF fine threading.