S-91255A167 8-32 x 1 1/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in demanding industrial environments
• Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for reliable performance under high stress
• Precision thread engagement through Class 3A fit and UNC coarse threading, ensuring secure fastening and vibration resistance
• Optimized installation efficiency with 3/32" hex drive and rounded button head design for easy access in confined spaces
• Full-threaded construction providing maximum grip length and uniform load distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.3 and ASTM F835 specifications for quality and safety
• Environmental responsibility with RoHS 3 and REACH compliance, suitable for regulated industries

Professional Applications & Engineering Value

Engineered for industrial machinery, equipment assembly, and precision manufacturing applications, these 8-32 UNC threaded screws deliver critical performance where vibration resistance and structural integrity are paramount. The black-oxide alloy steel construction provides essential protection against corrosion while maintaining the 120,000 psi tensile strength needed for high-stress connections. The rounded button head profile with hex drive enables flush mounting and tool accessibility in space-constrained assemblies, while the Class 3A thread fit ensures precise engagement that prevents loosening under dynamic loads. This combination of material durability, precision threading, and compliant design makes these fasteners ideal for automotive, aerospace, and heavy equipment applications requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

This 1-1/8" length screw features 8-32 UNC coarse threads with Class 3A precision fit for superior thread engagement. Manufacturing complies with ASME B18.3 dimensional standards and ASTM F835 material specifications. The product is RoHS 3 (2015/863/EU) compliant and meets REACH (EC 1907/2006) requirements for environmental safety, ensuring suitability for global industrial applications.