S-91255A629 3/8"-16 x 1 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 of 120,000 psi ensures reliable performance in heavy-duty applications, reducing the risk of fastener failure.
- Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant connections in critical assemblies.
- Black-oxide coating on alloy steel enhances corrosion resistance and durability, extending service life in harsh industrial environments.
- Fully threaded 3/8"-16 UNC coarse spacing allows for faster installation and stronger grip in a wide range of materials.
- Rockwell C39 hardness offers excellent wear resistance, maintaining thread integrity and fastener shape under high stress.
- Hex drive (7/32") with rounded button head enables easy tool access and a low-profile finish, minimizing snagging and improving safety.
- Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interoperability in professional engineering projects.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these rounded head hex screws in black-oxide alloy steel address common challenges like vibration loosening and material fatigue. The 3/8"-16 UNC coarse thread design ensures quick, secure fastening in metal, wood, and composite assemblies, ideal for machinery, automotive, and construction applications. With a high tensile strength of 120,000 psi and Rockwell C39 hardness, they resist deformation under load, providing long-term reliability. The fully threaded configuration and Class 3A fit enhance grip strength, reducing maintenance needs and downtime in critical operations.
Specification Summary & Compliance
This screw features precise Class 3A thread fit per UNC standards, with dimensions including a 1-3/4" length and 7/32" hex drive. It meets ASME B18.3 and ASTM F835 specifications for consistent manufacturing quality. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are adhered to for industrial use.
