S-91255A833 5-40 x 1" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications
- Precision Class 3A thread fit guarantees superior engagement and vibration resistance in critical assemblies
- Black-oxide coating on alloy steel provides enhanced corrosion resistance for extended service life
- 5/64" hex drive design enables secure tool engagement and prevents stripping during installation
- Fully threaded configuration offers maximum holding power along the entire 1" length
- Rockwell C39 hardness rating maintains thread integrity and prevents deformation under load
- Coarse UNC threading facilitates faster installation and reduces cross-threading risks
Professional Applications & Engineering Value
These 5-40 UNC Class 3A rounded head screws deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The black-oxide alloy steel construction combined with Class 3A thread precision addresses common industrial challenges of loosening under dynamic loads and environmental degradation. The button head profile with hex drive provides both aesthetic appeal and practical installation advantages in confined spaces. Engineered for demanding applications in machinery, automotive assemblies, and electronic enclosures, these fully threaded fasteners ensure uniform stress distribution while the coarse thread pitch enables rapid assembly in production environments. The combination of high tensile strength and corrosion-resistant surface treatment makes them ideal for applications requiring both mechanical reliability and environmental durability.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread tolerances with UNC coarse thread form and right-hand threading. Compliant with ASME B18.3 and ASTM F835 manufacturing specifications. Meets environmental standards including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations. The 1" length maintains dimensional accuracy within specified industrial tolerances for consistent performance across applications.
