S-91253A188 8-32 x 1 1/8" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating on alloy steel, extending service life in demanding industrial environments
• Superior thread engagement with Class 3A fit and UNC coarse threads for reliable, vibration-resistant fastening in high-stress applications
• High-strength performance delivering 130,000 psi tensile strength and Rockwell C39 hardness for maximum load-bearing capacity
• Optimized installation efficiency with 3/32" hex drive and standard flat head profile for flush mounting and secure tool engagement
• Full-threaded design providing consistent clamping force along the entire 1-1/8" length for uniform stress distribution
• Regulatory compliance assurance meeting ASTM F835 specifications and environmental standards including RoHS 3 and REACH
• Precision 82° countersink angle ensuring proper seating and flush installation in standard chamfered holes

Professional Applications & Engineering Value

These 8-32 UNC flat head screws with hex drive configuration solve critical fastening challenges in industrial assembly where space constraints and vibration resistance are paramount. The black-oxide alloy steel construction provides essential corrosion protection while maintaining the 130,000 psi tensile strength required for heavy-duty applications. The Class 3A thread fit ensures precise engagement in machinery, electronic enclosures, and automotive components, eliminating loosening under dynamic loads. The combination of fully threaded design and coarse UNC threading delivers rapid installation and superior holding power in metals and engineered plastics, making these screws ideal for production lines requiring both speed and reliability.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread tolerances with UNC coarse thread profile and 82° standard countersink angle. Complies with ASTM F835 mechanical and dimensional specifications, ensuring consistent quality and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for global industrial applications. Right-hand threading with fully threaded 1-1/8" length provides complete fastening versatility across various material thicknesses.