S-91794A583 5/16"-18 x 1" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, durable fastening
• Excellent thread engagement with UNC coarse threads and Class 2A fit ensuring secure installation and vibration resistance
• Optimized head design featuring a high, narrow fillister profile providing enhanced clearance and professional appearance
• Wide compatibility with standard slotted drivers for easy installation using common workshop tools
• Full threading along the 1" length enables maximum grip and adjustability in assembled components
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This 18-8 stainless steel fillister head screw delivers critical engineering value in industrial settings where corrosion resistance and mechanical reliability are paramount. The passivated finish significantly enhances surface durability against chemical exposure and oxidation, extending service life in manufacturing equipment, machinery assemblies, and outdoor applications. Its high, narrow rounded head profile provides superior clearance in counterbored holes while maintaining a low-profile appearance. The UNC coarse thread design ensures rapid assembly and superior resistance to loosening under vibration, making it ideal for industrial machinery, automotive components, and electronic enclosures. With full threading along the entire shank, it offers maximum thread engagement for secure fastening in demanding applications.

Specification Summary & Compliance

This screw features precision 5/16"-18 UNC coarse threads with Class 2A thread fit tolerances ensuring consistent performance. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial markets and restricted substance requirements.