S-91255A843 3/8"-24 x 2 1/4" 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 durability with 120,000 psi tensile strength and Rockwell C39 hardness, ideal for high-stress industrial environments.
- Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in demanding conditions.
- Precise, reliable fastening with Class 3A thread fit and fully threaded UNF fine threads, ensuring tight, secure connections.
- Easy installation and removal featuring a 7/32" hex drive and rounded button head design for efficient tool engagement.
- Broad compliance with industry standards including ASME B18.3 and ASTM F835, guaranteeing consistent quality and performance.
- Environmental and safety adherence with RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices.
- Versatile application fit due to the 2 1/4" length and right-hand thread direction, suitable for various assembly needs.
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Rounded Head Screw is engineered to address critical challenges in industrial settings, such as vibration resistance and long-term reliability. The alloy steel construction combined with a black-oxide surface treatment provides excellent protection against rust and wear, reducing maintenance costs in harsh environments. Its 3/8"-24 UNF fine threads and Class 3A fit deliver superior clamping force and precision, minimizing the risk of loosening in machinery, automotive, and heavy equipment applications. The fully threaded design and hex drive enable quick, secure installations, enhancing productivity while meeting rigorous standards like ASME B18.3 for dependable performance in high-stakes projects.
Specification Summary & Compliance
This screw features precise Class 3A thread fit and UNF fine threads with a diameter of 0.375" and length of 2 1/4", manufactured to ASME B18.3 and ASTM F835 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and adherence to global industry standards.
