S-90585A630 3/8"-16 x 1 3/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 Stainless Steel construction with passivated finish
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Precise Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
• Optimal drive engagement with 7/32" hex drive providing reliable torque transmission and reduced cam-out risk
• Full threading design delivers maximum grip length and uniform load distribution across the entire fastener
• Standard 82° countersink angle enables flush mounting for streamlined surfaces and improved aesthetics
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global market acceptance

Professional Applications & Engineering Value

These 316 Stainless Steel flat head screws with 3/8"-16 UNC coarse threading are engineered to solve critical challenges in demanding industrial environments. The combination of marine-grade stainless steel and passivated surface treatment provides exceptional protection against chemical exposure, saltwater corrosion, and extreme temperatures, making them ideal for marine equipment, chemical processing plants, and offshore installations. The Class 3A thread fit ensures precise engagement that maintains integrity under vibration and dynamic loads, while the flat head design with standard 82° countersink creates seamless surface transitions in machinery, structural frameworks, and precision equipment. These fully threaded screws distribute stress evenly, preventing localized failure points in high-stress applications where reliability is paramount.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerance for superior precision. The 3/8"-16 UNC coarse thread configuration provides optimal engagement in various materials, while the dimensional accuracy includes head diameter tolerance of -0.061" to 0". These screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. The mechanical properties meet 70,000 psi tensile strength and Rockwell B55 hardness standards for reliable performance in industrial fastening applications.