S-91355A191 3/8"-16 x 5/8" Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability and corrosion resistance with black-oxide coating on alloy steel, ideal for harsh industrial environments
• Superior tensile strength of 120,000 psi ensures reliable performance under heavy loads and vibration
• Precise Class 3A UNC thread fit provides secure, tight fastening with minimal risk of loosening
• Convenient hex drive (7/32") design allows for easy installation and removal with standard tools
• Wide rounded button head with integrated flange distributes clamping force evenly and eliminates the need for separate washers
• Fully threaded coarse spacing enables faster assembly and stronger holding power in various materials
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global supply chain acceptance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these black-oxide alloy steel rounded head screws deliver exceptional reliability in machinery, automotive assemblies, and heavy equipment. The Class 3A UNC coarse thread ensures rapid installation and high resistance to vibrational loosening, while the flanged button head design provides a clean finish and enhanced bearing surface. With a Rockwell C32 hardness and 120,000 psi tensile strength, they withstand extreme stress and repetitive loads, reducing maintenance downtime. The hex drive offers superior torque transmission, making them ideal for high-torque applications where screw integrity is critical.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC coarse thread with Class 3A fit for precise dimensional accuracy, fully threaded for maximum grip. Manufactured from alloy steel with black-oxide finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring adherence to international environmental and safety regulations for industrial use.