S-91255A163 8-32 x 5/32" 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 tensile strength (120,000 psi) ensures reliable performance under heavy loads
• Precise Class 3A thread fit provides secure, vibration-resistant fastening
• Fully threaded design allows for maximum grip and uniform load distribution
• Hex drive compatibility (3/32") enables quick installation with standard tools
• High hardness (Rockwell C39) maintains thread integrity and resists wear
• Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH guarantees quality and environmental safety

Professional Applications & Engineering Value

These 8-32 UNC thread screws with black-oxide alloy steel construction address critical industrial challenges such as corrosion and mechanical stress. The coarse thread spacing and fully threaded design ensure rapid assembly and strong holding power in materials like metal and hardened plastics, reducing the risk of stripping. With a rounded head and hex drive, they offer easy access in confined spaces, making them ideal for machinery, automotive, and electrical enclosures where durability and compliance with ASME B18.3 standards are paramount for long-term reliability.

Specification Summary & Compliance

These screws feature precise Class 3A thread fit and UNC coarse threads for optimal engagement, manufactured to ASME B18.3 and ASTM F835 specifications. They comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free from hazardous substances and suitable for global industrial use.