S-91255A647 3/8"-24 x 1 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating protecting against rust in demanding environments
• Exceptional thread engagement with Class 3A fit ensuring precise, vibration-resistant connections
• High-torque capability through hex drive design allowing secure installation in tight spaces
• Maximum load distribution with rounded head profile minimizing surface damage during fastening
• Reliable performance under stress with 120,000 psi tensile strength for heavy-duty applications
• Consistent mechanical properties with Rockwell C39 hardness maintaining structural integrity
• Full regulatory compliance meeting ASME, ASTM, RoHS 3 and REACH standards for global deployment

Professional Applications & Engineering Value

These black-oxide alloy steel hex screws deliver critical performance advantages in industrial assemblies where vibration resistance and corrosion protection are paramount. The 3/8"-24 UNF fine threading with Class 3A fit provides superior holding power in precision equipment, while the fully threaded design ensures consistent clamping force across the entire fastener length. Engineered to ASME B18.3 and ASTM F835 specifications, these rounded head button screws with 7/32" hex drive solve common assembly challenges in machinery, automotive, and heavy equipment applications where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread tolerances with UNF fine thread spacing and right-hand threading. Compliant with ASME B18.3 dimensional standards and ASTM F835 material specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use in regulated industries.