S-91255A197 8-32 x 3/4" 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 – Withstands up to 120,000 psi for reliable performance in high-stress applications.
- Superior Corrosion Resistance – Black-oxide coating on alloy steel protects against rust and extends service life.
- Precision Thread Fit – Class 3A UNC coarse threads ensure secure, vibration-resistant fastening.
- Easy Installation & Removal – Hex drive (3/32") allows for quick assembly with standard tools.
- Low-Profile Rounded Head – Button-style design minimizes protrusion and reduces snagging risks.
- Full Thread Engagement – Fully threaded shank provides consistent clamping force along the entire length.
- High Hardness Rating – Rockwell C39 hardness offers excellent wear resistance and durability.
Professional Applications & Engineering Value
This 8-32 UNC 3/4" rounded head screw is engineered for demanding industrial environments where reliability is critical. The black-oxide alloy steel construction provides superior corrosion resistance, making it ideal for machinery, automotive assemblies, and outdoor equipment exposed to harsh conditions. Its Class 3A thread fit and coarse thread spacing deliver exceptional grip and vibration resistance, preventing loosening under dynamic loads. The hex drive design ensures easy installation in confined spaces, while the fully threaded body distributes stress evenly, reducing the risk of joint failure. Suitable for heavy-duty fastening in construction, manufacturing, and electronics, this screw combines high tensile strength with compliance to major industry standards for long-term performance.
Specification Summary & Compliance
This screw meets precise dimensional tolerances with a Class 3A thread fit per UNC standards and a length of 3/4". It complies with ASME B18.3 and ASTM F835 manufacturing specifications, ensuring consistent quality and interoperability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.
