S-98164A611 1-72 x 1/8" 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
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable, vibration-resistant fastening
• High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding applications
• Easy installation and removal with hex drive design requiring only 0.050" drive tools
• Space-saving rounded button head profile offers a low-profile finish without compromising strength
• Full threading along the 1/8" length maximizes grip and distribution of clamping force
• Compliance with major industrial standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety

Professional Applications & Engineering Value

This 1-72 UNF Class 3A rounded head screw in 316 stainless steel addresses critical needs in precision assemblies where corrosion resistance and fine thread accuracy are paramount. The passivated finish enhances durability against chemicals and moisture, making it suitable for marine, chemical processing, and medical equipment. Its fully threaded design and 70,000 psi tensile strength ensure secure fastening in tight spaces, reducing the risk of loosening under vibration. The hex drive and rounded button head facilitate easy installation in confined areas, providing a reliable solution for industrial screws requiring consistent performance and regulatory compliance.

Specification Summary & Compliance

This screw features a 1-72 UNF fine thread with Class 3A fit for high precision, a 1/8" length, and is fully threaded. It meets ASME B18.3 specifications (referencing ASTM F879) and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and industrial reliability.