S-91253A167 6-32 x 2 1/2" 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 conditions, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
• Partially threaded design allows for controlled clamping force and prevents over-tightening in materials like metal or plastic.
• 82° countersink angle enables a flush, low-profile installation, minimizing protrusion and improving aesthetic finish.
• Hex drive compatibility with 5/64" tools offers efficient installation and removal, reducing assembly time and labor costs.
• Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for global supply chain compatibility.

Professional Applications & Engineering Value

These 6-32 UNC flat head screws are engineered to address common industrial fastening challenges, such as vibration loosening and material fatigue. The black-oxide alloy steel construction provides enhanced durability and resistance to rust, making them ideal for machinery, automotive, and electrical enclosures where exposure to moisture or chemicals is a concern. The coarse thread spacing and Class 3A thread fit ensure quick, secure engagement in various substrates, reducing installation errors. With partial threading, these screws offer precise load distribution, preventing damage to sensitive components. Their hex drive design facilitates high-torque applications, streamlining maintenance and assembly processes in production lines.

Specification Summary & Compliance

This screw meets ASTM F835 specifications for dimensional accuracy and mechanical properties, with a Class 3A thread fit for superior precision. It features UNC coarse threads, a length of 2 1/2", and a minimum thread length of 3/4". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for international industrial use.