S-91253A144 6-32 x 1/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength of 130,000 psi ensures reliable performance under high-stress industrial applications, reducing the risk of fastener failure.
• Class 3A Thread Fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in machinery and equipment.
• Black-Oxide Alloy Steel offers enhanced corrosion resistance and durability, extending service life in demanding environments.
• Fully Threaded Design allows for maximum grip and uniform load distribution along the entire length, improving joint integrity.
• 82° Countersink Angle ensures a flush, low-profile finish when installed, minimizing protrusion and enhancing safety in assembled components.
• Hex Drive (5/64") enables easy installation and removal with standard tools, reducing assembly time and labor costs.
• Rockwell C39 Hardness provides excellent wear resistance, maintaining thread integrity through repeated use and adjustments.

Professional Applications & Engineering Value

This 6-32 UNC flat head screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction, combined with a coarse thread and Class 3A fit, ensures secure fastening in dynamic applications like automotive assemblies, electronic enclosures, and heavy machinery. The fully threaded design distributes clamping force evenly, reducing stress concentrations and preventing joint failure. With its right-hand thread and standardized inch system dimensions, it simplifies inventory management and compatibility across various sectors, offering reliable performance where precision and durability are critical.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for tight tolerances and UNC coarse threading for robust engagement. It meets ASME B18.3 and ASTM F835 specifications, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, making it suitable for global industrial use where environmental and safety standards are prioritized.