S-91783A213 8-32 x 4" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-term reliability in harsh environments
• Superior holding power with 100,000 psi tensile strength and Rockwell B100 hardness to withstand high-stress applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit for quick assembly and secure fastening
• Enhanced durability with partial threading design that maintains shank strength while providing controlled thread engagement
• Broad compatibility with standard slotted drive tools for easy installation across various industrial settings
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global supply chain integration
• Precision dimensional control with rounded head profile ensuring consistent seating and uniform pressure distribution

Professional Applications & Engineering Value

This 8-32 UNC coarse thread rounded head screw delivers critical engineering advantages for industrial applications where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition combined with passivated finish creates a protective oxide layer that significantly extends service life in moisture-rich or chemically aggressive environments. The partially threaded design provides optimal clamping force distribution, preventing material deformation while maintaining the full 100,000 psi tensile strength of the unthreaded shank section. These industrial fasteners are particularly valuable in electrical enclosures, machinery assembly, and structural frameworks where the rounded head profile ensures smooth surface transition and the slotted drive accommodates both manual and automated installation processes.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerance ensuring consistent mating with standard UNC nuts and threaded components. The 4" length with 1-1/2" minimum thread length provides versatile fastening capabilities across various material thicknesses. Compliance includes ASME B18.6.3 mechanical standards for dimensional accuracy and performance, along with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted substances for international industrial applications.