S-91781A624 3/8"-16 x 1" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable, long-lasting fastening under demanding mechanical loads
• Precise Class 2A thread fit with UNC coarse threading for easy installation and secure engagement in various materials
• Standard 82° countersink angle allows for flush mounting, providing a clean, professional finish
• Full threading along the 1" length maximizes grip and load distribution across the entire fastener
• Consistent Rockwell B80 hardness offers excellent durability and resistance to wear over time
• Compliance with ASME B18.6.3 and environmental standards guarantees quality, safety, and regulatory adherence

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 3/8"-16 UNC flat head slotted screws provide a robust fastening solution where corrosion resistance and mechanical strength are critical. The 18-8 stainless steel material combined with a passivated finish effectively combats rust and chemical exposure, making them suitable for applications in marine, chemical processing, and outdoor equipment. The coarse UNC thread and Class 2A fit ensure quick, reliable installation in soft metals or plastics, reducing assembly time while maintaining high clamp force. With an 82° countersink angle, they sit flush in pre-drilled holes, minimizing protrusion and enhancing safety in machinery and structural assemblies. These screws are ideal for securing components in automotive, construction, and manufacturing industries, where vibration resistance and long-term performance are essential.

Specification Summary & Compliance

This flat head screw features a 3/8"-16 UNC coarse thread with Class 2A dimensional accuracy for consistent fit and performance. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring adherence to industry standards for dimensions and mechanical properties. The product is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming its environmental safety and suitability for global markets.