S-91255A262 10-32 x 5/16" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• Superior thread engagement with Class 3A fit and UNF fine threading for vibration-resistant fastening
• High tensile strength of 120,000 psi ensures reliable performance under heavy loads
• Rockwell C39 hardness provides excellent wear resistance and durability
• Fully threaded design maximizes grip and holding power across the entire length
• 1/8" hex drive allows for secure tool engagement and easy installation
• Rounded button head profile offers a low-profile finish while distributing clamp load effectively

Professional Applications & Engineering Value

These black-oxide alloy steel rounded head screws are engineered to address critical industrial challenges where vibration resistance, corrosion protection, and high tensile strength are paramount. The 10-32 UNF Class 3A fine threading ensures precise fitment in applications requiring secure fastening in machinery, automotive assemblies, and electronic enclosures. The fully threaded design combined with 120,000 psi tensile strength provides consistent clamping force, reducing the risk of loosening under dynamic loads. The black-oxide surface treatment enhances durability in exposed or humid conditions, making these hex drive screws a reliable choice for maintenance, manufacturing, and heavy equipment sectors.

Specification Summary & Compliance

This product meets Class 3A thread fit tolerances for precision assembly, manufactured in accordance with ASME B18.3 and ASTM F835 standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety adherence for global industrial use.