S-91857A540 1/4"-20 x 3/4" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments
• Enhanced durability and longevity from passivated surface treatment that prevents oxidation and extends service life
• Reliable fastening performance with 100,000 psi tensile strength and Rockwell B100 hardness for heavy-duty applications
• Quick installation and secure fit through coarse UNC threading and Class 2A thread fit ensuring consistent engagement
• Broad industrial compatibility with fully threaded design and standard slotted drive for versatile tool access
• Regulatory peace of mind with full compliance to ASME B18.6.3, RoHS 3, and REACH standards
• Optimized head design featuring rounded profile for reduced snagging and improved aesthetic integration

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 316 stainless steel rounded head slotted screw delivers exceptional performance where corrosion resistance is critical. The passivated finish provides an additional protective layer against chemical exposure and saltwater conditions, making it ideal for marine equipment, chemical processing plants, and food processing machinery. With its coarse UNC 1/4-20 threading and Class 2A thread fit, the screw ensures rapid installation and vibration-resistant fastening in structural assemblies, machinery frames, and outdoor installations. The combination of 100,000 psi tensile strength and fully threaded design guarantees uniform load distribution, preventing joint failure in high-stress applications while maintaining compliance with international engineering standards.

Specification Summary & Compliance

This rounded head slotted screw maintains precision Class 2A thread fit with 1/4-20 UNC coarse threading and right-hand thread direction. Manufacturing specifications strictly adhere to ASME B18.6.3 standards for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial applications.