S-98164A178 10-32 x 1/2" 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, ideal for harsh environments and chemical exposure
• Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening in critical assemblies
• High tensile strength of 70,000 psi provides dependable load-bearing capacity for demanding industrial applications
• Enhanced durability from Rockwell B55 hardness and passivated finish, resisting wear and extending service life
• Secure hex drive engagement with 1/8" drive size allows for efficient installation and high torque application
• Full threading along the 1/2" length offers maximum grip and uniform stress distribution in fastened joints
• Compliance with major industry standards including ASME B18.3 and ASTM F879, ensuring quality and interoperability

Professional Applications & Engineering Value

This 10-32 UNF rounded head screw in 316 stainless steel addresses critical engineering challenges in corrosive and high-stress environments. The fine thread spacing and Class 3A thread fit deliver superior clamping force and vibration resistance, preventing loosening in dynamic applications such as machinery, marine equipment, and chemical processing systems. The passivated finish enhances the innate corrosion resistance of 316 stainless steel, making it suitable for outdoor, saline, or acidic conditions where fastener failure is not an option. Its rounded button head and hex drive facilitate easy installation in confined spaces, providing a flush profile that minimizes snagging while maintaining a professional appearance. These features collectively ensure long-term reliability, reduce maintenance frequency, and uphold structural integrity in industrial screws and heavy-duty fasteners applications.

Specification Summary & Compliance

This screw features a 10-32 UNF thread with Class 3A precision tolerance and fine thread spacing, ensuring exact fit and performance. It is manufactured in compliance with ASME B18.3 and ASTM F879 specifications, guaranteeing consistent quality and dimensional accuracy. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.