S-91253A206 8-32 x 1 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional durability and corrosion resistance with black-oxide coating on alloy steel, ideal for harsh industrial environments.
• High tensile strength of 130,000 psi ensures reliable, secure fastening under heavy loads and vibrations.
• Precise Class 3A thread fit guarantees smooth assembly and reduced risk of cross-threading in critical applications.
• Partially threaded design allows for controlled clamping force and prevents over-tightening in assemblies.
• Standard 82° countersink angle provides a flush, professional finish without protruding heads.
• Hex drive (3/32") compatibility enables easy installation with common tools, reducing assembly time.
• Compliance with ASTM F835, RoHS 3, and REACH ensures safety, environmental responsibility, and regulatory acceptance.

Professional Applications & Engineering Value

These 8-32 UNC flat head screws are engineered to address common industrial challenges, such as vibration loosening and material fatigue. Made from black-oxide alloy steel, they offer superior resistance to rust and wear, making them ideal for machinery, automotive, and electronics assemblies where reliability is critical. The coarse UNC thread ensures quick engagement and strong holding power in various materials, while the partial threading design minimizes stress concentration. With a Rockwell C39 hardness and high tensile strength, these screws withstand extreme conditions without failure, reducing maintenance costs and downtime in industrial applications.

Specification Summary & Compliance

This screw features precise Class 3A thread fit and adheres to UNC coarse thread standards for consistent performance. Manufacturing follows ASTM F835 specifications, ensuring dimensional accuracy and mechanical properties. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and suitability for global industrial use.