S-91253A914 1"-8 x 2 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head 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 load-bearing capability with 130,000 psi tensile strength for secure fastening in demanding environments.
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in industrial settings.
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable, vibration-resistant connections.
- Efficient installation and removal using the 5/8" hex drive, compatible with standard tools for quick assembly.
- Optimal flush seating due to the 82° countersink angle and flat head design, minimizing protrusion in assembled structures.
- High durability backed by Rockwell C37 hardness, resisting wear and deformation under stress.
- Full regulatory compliance with ASTM F835, RoHS 3, and REACH, meeting strict industry and environmental standards.
Professional Applications & Engineering Value
This flat head screw with black-oxide alloy steel construction addresses critical needs in heavy machinery, automotive, and structural assemblies where high tensile strength and corrosion resistance are paramount. The 1"-8 UNC coarse threading and Class 3A fit provide excellent grip in coarse-grained materials, reducing the risk of stripping under dynamic loads. Its fully threaded design ensures uniform stress distribution, while the 82° countersink angle allows for seamless integration into countersunk holes, enhancing aerodynamic and aesthetic profiles. Ideal for applications requiring reliable industrial fasteners that withstand harsh conditions without compromising on RoHS and REACH compliance for global supply chain compatibility.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise tolerance, with UNC coarse threads (1"-8) and right-hand threading. Manufacturing follows ASTM F835 specifications, ensuring consistent quality and performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances for safe use in various industries.
