S-91793A112 4-40 x 5/8" ASME B18.6.3 Stainless Steel Binding Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Precise thread engagement through Class 2A fit and UNC coarse threading, providing secure fastening with reduced cross-threading risk
• Optimized binding head design with wide rounded profile for enhanced bearing surface and improved component protection
• Full threading along 5/8" length enables maximum grip range and versatile installation depth options
• Slotted drive compatibility for straightforward installation using standard tools while maintaining clean aesthetic appearance
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 4-40 UNC rounded head binding screws deliver critical performance advantages for precision assembly applications where corrosion resistance and mechanical reliability are paramount. The combination of 18-8 stainless steel material with passivated finish provides exceptional protection against oxidation and chemical degradation, making these fasteners ideal for electronic enclosures, instrumentation, and marine components. The binding head design with wide bearing surface distributes clamping force effectively, preventing damage to delicate materials while the coarse UNC threading ensures rapid installation and secure holding power in various substrates. Engineered to ASME B18.6.3 standards, these screws maintain dimensional consistency for interchangeable use across production runs, reducing assembly time and improving manufacturing efficiency.

Specification Summary & Compliance

This rounded head binding screw features precise 4-40 UNC coarse threads with Class 2A fit tolerance ensuring consistent engagement and reliable performance. Manufactured according to ASME B18.6.3 specifications with complete 5/8" length threading and right-hand thread direction. The product demonstrates full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, meeting the latest environmental standards for industrial components.