S-91253A050 1-72 x 1/8" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in demanding environments
• Exceptional thread precision with Class 3A fit and UNF fine threads ensuring secure, vibration-resistant fastening
• High-strength performance delivering 130,000 psi tensile strength for reliable load-bearing in critical assemblies
• Optimized drive efficiency with 0.050" hex drive providing positive torque transfer and reduced cam-out risk
• Enhanced flush mounting featuring standard 82° countersink angle for seamless surface integration
• Full-thread engagement along the 1/8" length maximizing grip strength and distribution
• Industry compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

Engineered for precision assemblies where space constraints and reliability are paramount, these 1-72 UNF flat head screws solve critical fastening challenges in electronics, aerospace subassemblies, and precision instrumentation. The black-oxide alloy steel construction resists environmental degradation while the Class 3A thread fit eliminates play in vibration-prone applications. The hex drive design prevents stripping during high-torque installation, and the fine thread spacing provides superior clamping force in thin-section materials. These screws deliver consistent performance in automated production environments where fully threaded engagement ensures uniform stress distribution.

Specification Summary & Compliance

Manufactured to ASTM F835 specifications with Class 3A thread tolerances for precision UNF fine threads. The 82° countersink angle conforms to standard flat head profiles. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification includes Rockwell C39 hardness and 130,000 psi tensile strength verification.