S-91255A645 3/8"-24 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
- Superior corrosion resistance with Black-Oxide finish, extending service life in demanding industrial environments
- Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precise Class 3A thread fit ensures secure, vibration-resistant connections in critical assemblies
- Optimized torque transmission through 7/32" hex drive design, preventing tool slippage during installation
- Full threading capability provides consistent engagement along the entire 1" length for uniform load distribution
- Fine UNF thread profile delivers enhanced clamping force and superior resistance to loosening
- Regulatory compliance meets ASME B18.3 and ASTM F835 standards while being RoHS 3 and REACH compliant
Professional Applications & Engineering Value
Engineered for high-performance industrial applications, these Black-Oxide Alloy Steel rounded head screws solve critical fastening challenges in machinery, automotive, and heavy equipment sectors. The 3/8"-24 UNF fine thread configuration provides superior resistance to vibrational loosening while maintaining precise alignment in Class 3A threaded components. The 7/32" hex drive ensures efficient torque application without cam-out, particularly valuable in confined spaces where the button head profile offers reduced protrusion. With 120,000 psi tensile strength and Rockwell C39 hardness, these fully threaded screws maintain integrity under extreme mechanical stress, making them ideal for critical structural connections requiring reliable, long-term performance.
Specification Summary & Compliance
This rounded head hex screw features precision 3/8"-24 UNF Class 3A threads with fine thread spacing and right-hand orientation. Manufacturing complies with ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for hazardous substance restrictions.
