S-91253A158 6-32 x 1 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional durability with 130,000 psi tensile strength and Rockwell C39 hardness for reliable performance in demanding applications
• Superior corrosion resistance through black-oxide coating on alloy steel, extending service life in harsh industrial environments
• Precise flush mounting with 82° countersink angle and standard flat head profile for seamless surface integration
• Enhanced driving efficiency with hex drive design providing superior torque transmission and reduced cam-out risk
• Optimized thread engagement through Class 3A thread fit ensuring secure fastening with minimal vibration loosening
• Versatile installation flexibility with partially threaded design allowing precise clamping force control
• Regulatory compliance assurance meeting ASTM F835 specifications and international environmental standards

Professional Applications & Engineering Value

These 6-32 UNC flat head screws deliver critical engineering solutions where surface flushness and high-strength fastening are paramount. The black-oxide alloy steel construction provides exceptional corrosion resistance while maintaining 130,000 psi tensile strength, making them ideal for industrial machinery, electronic enclosures, and automotive assemblies. The 82° countersink angle ensures perfect surface alignment, while the hex drive prevents stripping during high-torque installation. The partially threaded design allows precise clamping control in multi-material applications, and the Class 3A thread fit guarantees vibration resistance in dynamic environments. These screws address common industrial challenges including corrosion protection, installation efficiency, and long-term reliability in demanding operating conditions.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread spacing for optimal engagement. Complies with ASTM F835 manufacturing specifications ensuring consistent quality and performance. Meets international regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental standards. The 1 3/4" length with 3/4" minimum thread length provides versatile fastening capability across various material thicknesses while maintaining structural integrity.