S-98164A304 3/8"-16 x 1" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction and passivated surface treatment
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high stress
• Precise, secure fastening ensured by Class 3A thread fit, providing tighter tolerances and reduced risk of loosening
• Easy installation and removal with a 7/32" hex drive and fully threaded UNC coarse spacing for quick assembly
• Durable, low-profile design featuring a rounded button head that resists snagging and provides a finished appearance
• Long-term reliability backed by compliance with ASME B18.3, ASTM F879, RoHS 3, and REACH standards
• Versatile industrial use as a fully threaded, 1-inch length screw suitable for various heavy-duty applications

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw is engineered to address critical challenges in demanding industrial settings, such as exposure to corrosive chemicals, saltwater, and high humidity. The passivated finish enhances the natural corrosion resistance of the material, significantly extending service life in applications like marine equipment, chemical processing plants, and food machinery. Its UNC coarse thread and Class 3A thread fit provide superior grip and vibration resistance, reducing maintenance needs in dynamic environments. The combination of 70,000 psi tensile strength and a hex drive allows for high torque application without stripping, making it an ideal heavy-duty fastener for structural assemblies, machinery, and transportation equipment where failure is not an option.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for high accuracy and UNC coarse thread spacing (3/8"-16). It is manufactured in compliance with ASME B18.3 and ASTM F879 specifications, ensuring consistent quality and performance. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.