S-91792A107 4-40 x 5/16" ASME B18.6.3 Stainless Steel Pan Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable, long-term fastening performance
• Optimized thread engagement through coarse UNC threading and Class 2A fit, ensuring secure installation and vibration resistance
• Easy manual installation with standard slotted drive and rounded pan head design for straightforward tool compatibility
• Full thread coverage across the entire 5/16" length, providing maximum grip and load distribution in assemblies
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Versatile right-hand threading compatible with standard industrial components and assembly processes

Professional Applications & Engineering Value

These 4-40 UNC coarse thread pan head slotted screws deliver critical performance advantages in demanding industrial applications. The combination of 18-8 stainless steel material and passivated finish provides exceptional protection against corrosion, making them ideal for electronics enclosures, machinery components, and outdoor equipment where environmental exposure is a concern. The fully threaded design ensures maximum holding power across the entire fastener length, while the Class 2A thread fit guarantees precise engagement without binding. The rounded pan head with slotted drive offers both aesthetic appeal and practical installation benefits, particularly in applications requiring frequent maintenance or adjustments. These screws effectively solve common engineering challenges including material compatibility issues, vibration-induced loosening, and regulatory compliance requirements in industrial manufacturing environments.

Specification Summary & Compliance

This fastener features precision 4-40 UNC coarse threads with Class 2A fit tolerance for consistent performance. Manufacturing complies with ASME B18.6.3 specifications ensuring dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming the absence of restricted substances. The 5/16" length and fully threaded construction provide reliable fastening across various material thicknesses while maintaining the specified 100,000 psi tensile strength and Rockwell B100 hardness throughout the fastener's service life.