S-91306A251 3-48 x 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc plating, ideal for harsh industrial environments
• High tensile strength of 120,000 PSI ensures reliable performance under heavy loads
• Precise Class 3A thread fit provides superior assembly accuracy and vibration resistance
• Durable Rockwell C39 hardness offers excellent wear resistance and long service life
• Hex drive design allows for easy installation and high torque application
• Fully threaded coarse UNC spacing enables faster installation and strong holding power
• Compliant with major industry standards including ASME B18.3 and ASTM F835 for guaranteed quality

Professional Applications & Engineering Value

These 3-48 UNC zinc-plated alloy steel rounded head screws are engineered to solve critical fastening challenges in demanding industrial applications. The combination of high tensile strength (120,000 PSI) and Rockwell C39 hardness ensures reliable performance in vibration-prone environments, while the zinc plating provides essential corrosion protection for extended service life. The hex drive and button head design facilitate easy installation in confined spaces, making them ideal for machinery assembly, electronic enclosures, and automotive components where Class 3A thread fit precision is crucial for maintaining structural integrity under dynamic loads.

Specification Summary & Compliance

These screws feature 3-48 UNC coarse threads with Class 3A fit for precise dimensional accuracy, manufactured to ASME B18.3 and ASTM F835 specifications. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while maintaining consistent quality and performance standards.