S-91253A979 1"-8 x 1 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
- Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
- High tensile strength of 130,000 psi ensures reliable performance under extreme mechanical loads and vibrations.
- Precise Class 3A thread fit guarantees secure fastening with minimal risk of loosening in critical assemblies.
- 82° countersink angle and flat head design provide a flush, professional finish that reduces snagging and improves safety.
- 5/8" hex drive allows for high-torque installation with standard tools, speeding up assembly and maintenance.
- Fully threaded coarse (UNC) design enables quick engagement and strong holding power in a wide range of materials.
- Compliance with ASTM F835, RoHS 3, and REACH ensures material safety and meets rigorous international standards for industrial use.
Professional Applications & Engineering Value
Engineered for demanding applications, these black-oxide alloy steel flat head hex screws deliver exceptional durability and reliability. The 1"-8 UNC coarse thread with Class 3A fit provides superior resistance to vibration loosening, making them ideal for heavy machinery, structural steel frames, and automotive assemblies where high tensile strength (130,000 psi) is critical. The 82° countersink angle ensures a smooth, flush mount that minimizes protrusion risks in confined spaces. With a Rockwell C37 hardness and robust fully threaded design, they offer consistent performance in high-stress environments, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This screw adheres to inch system dimensions with a 1"-8 UNC coarse thread and Class 3A thread fit for precise tolerance. It meets ASTM F835 specifications for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use in global industrial markets.
