S-91255A825 1-72 x 3/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coating, extending service life in demanding industrial environments
• Precise Class 3A thread fit ensures superior engagement and vibration resistance in critical assemblies
• High tensile strength (120,000 psi) provides reliable fastening performance under extreme mechanical stress
• Fine UNF threading delivers enhanced clamping force and superior resistance to loosening
• Rockwell C39 hardness rating maintains thread integrity and prevents stripping during repeated installations
• Low-profile rounded button head design offers flush mounting while accommodating standard hex drivers
• Full compliance with industry standards including ASME B18.3 and ASTM F835 for guaranteed dimensional accuracy

Professional Applications & Engineering Value

Engineered for precision applications where reliable fastening performance and corrosion resistance are critical, these Black-Oxide Alloy Steel screws solve common industrial challenges. The combination of fine UNF threading and Class 3A thread fit ensures maximum engagement in thin materials and vibration-prone environments, preventing costly assembly failures. The rounded head design with hex drive provides secure installation in confined spaces while maintaining a low profile. Ideal for electronics enclosures, precision instruments, and aerospace components, these fully threaded screws deliver consistent performance across temperature variations and mechanical stress conditions.

Specification Summary & Compliance

Manufactured to ASME B18.3 and ASTM F835 specifications with precise Class 3A thread fit tolerance for superior dimensional accuracy. The 1-72 UNF fine thread configuration ensures optimal performance in precision applications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for hazardous substance restrictions.