S-98164A420 0-80 x 1/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh chemical and marine environments
• Exceptional thread engagement from Class 3A fit and fine UNF threading, ensuring vibration-resistant, secure fastening
• Enhanced durability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load
• Easy installation and removal with hex drive design, reducing tool slippage and assembly time
• Extended service life thanks to passivated finish that increases resistance to corrosion and wear
• Full threading along the 1/8" length provides maximum grip and uniform stress distribution
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance

Professional Applications & Engineering Value

This 0-80 UNF fine thread rounded head screw in 316 Stainless Steel addresses critical challenges in precision assembly and corrosive settings. Its Class 3A thread fit and fine threading deliver tight tolerances, minimizing loosening in high-vibration applications like electronics, aerospace, and medical devices. The passivated finish enhances the innate corrosion resistance of 316 stainless, making it suitable for offshore equipment, chemical processing, and food-grade machinery where moisture and chemicals are prevalent. The hex drive and button head design allow for low-profile, tool-accessible fastening in confined spaces, improving installation efficiency and reducing the risk of stripping. Engineered to meet ASME B18.3 specifications, it ensures consistent quality and reliability for industrial fastening needs.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 3A thread fit and UNF fine thread type (0-80 size), ensuring high accuracy and interchangeability. Manufacturing follows ASME B18.3 specifications for rounded head screws, with a length of 1/8" and full threading. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmental and safety standards in global supply chains.