S-91306A268 8-32 x 1 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• Superior thread engagement with Class 3A fit ensuring precise, secure fastening in critical applications
• High tensile strength of 120,000 psi provides reliable performance under extreme mechanical stress
• Rockwell C39 hardness maintains structural integrity and prevents thread deformation during installation
• Full threading design allows maximum grip length and uniform load distribution across the entire fastener
• Hex drive compatibility enables quick installation with standard tools while preventing cam-out
• Rounded button head profile offers a low-profile finish that reduces snagging hazards in assembly operations

Professional Applications & Engineering Value

These 8-32 UNC coarse thread screws with zinc-plated alloy steel construction address critical industrial fastening challenges where vibration resistance and long-term reliability are paramount. The Class 3A thread fit ensures precise tolerance control for applications requiring repeated disassembly and reassembly, while the coarse threading provides superior performance in softer materials and high-vibration environments. The rounded button head design combines aesthetic appeal with functional safety, eliminating sharp edges in exposed applications. Engineered for machinery assembly, electrical enclosures, and structural frameworks, these fully threaded screws deliver consistent clamping force across their entire 1½" length, making them ideal for securing components where uniform pressure distribution is critical to performance.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 and ASTM F835 specifications, these screws feature precision UNC coarse threads with Class 3A fit for superior dimensional accuracy. The right-hand threading and 3/32" hex drive ensure compatibility with standard industrial tools. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and workplace safety standards, making these fasteners suitable for global industrial supply chains and regulated manufacturing environments.