S-91255A043 3/8"-16 x 3/8" ASTM F835 Steel 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 the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• Convenient 7/32" hex drive allows for easy installation and removal with standard tools, speeding up assembly processes.
• Fully threaded design offers consistent grip along the entire length, enhancing load distribution and joint stability.
• High hardness (Rockwell C39) resists wear and deformation, ensuring long-term durability and repeated use without degradation.
• Coarse UNC threading enables quick engagement and disassembly, ideal for applications requiring frequent maintenance or adjustments.

Professional Applications & Engineering Value

This 3/8"-16 UNC button head screw is engineered from black-oxide alloy steel to address common industrial challenges such as corrosion, vibration loosening, and high mechanical stress. The combination of Class 3A thread fit and coarse threading ensures secure fastening in dynamic environments, reducing maintenance needs in machinery, automotive assemblies, and structural frameworks. The rounded head profile and hex drive facilitate smooth installation in confined spaces, while the high tensile strength and hardness provide reliable performance in heavy-duty applications, from manufacturing equipment to construction projects. By meeting strict standards, it delivers consistent engineering value through enhanced safety and longevity.

Specification Summary & Compliance

This product features precise Class 3A thread fit with 3/8"-16 UNC coarse threading, ensuring accurate engagement and dimensional consistency. It complies with ASME B18.3 and ASTM F835 specifications for manufacturing quality, and adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and safety standards for industrial use.