S-91355A193 3/8"-16 x 2" Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing failure risks in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure fastening and vibration resistance in machinery assemblies.
• Wide button head with integrated flange distributes clamping force evenly, minimizing surface damage and eliminating the need for separate washers.
• Fully threaded UNC coarse design allows for faster installation and improved grip in a variety of materials, boosting assembly efficiency.
• 7/32" hex drive offers high torque capability and slip-resistant engagement for quick, secure tightening with standard tools.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial use.

Professional Applications & Engineering Value

This black-oxide alloy steel rounded head hex screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-load demands. The UNC coarse thread with Class 3A fit ensures precise engagement in metals and composites, reducing the risk of cross-threading and enhancing joint integrity. Its flanged wide button head provides a larger bearing surface, which helps prevent pull-through in soft materials and distributes stress effectively. Ideal for heavy machinery, automotive assemblies, and structural frameworks, this screw combines 120,000 psi tensile strength and Rockwell C32 hardness to withstand dynamic loads and repetitive stress, ensuring long-term reliability in critical applications while maintaining compliance with industry regulations.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 3A thread fit for high precision, featuring a 3/8"-16 thread size, 2" length, and fully threaded design. Manufacturing conforms to specified dimensions including a 0.813" flange diameter and 7/32" hex drive. It is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety standards for industrial components.