S-91253A916 1"-8 x 3" 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 tensile strength of 130,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in demanding environments.
- Precise Class 3A thread fit guarantees tight, secure connections with minimal play, enhancing assembly integrity.
- Optimized for high-torque installation with a 5/8" hex drive, allowing for efficient and secure fastening without stripping.
- Full threading along the 3" length offers maximum grip and adjustability in various material thicknesses.
- 82° countersink angle enables a flush, low-profile finish, ideal for applications where protrusion is a concern.
- Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to strict industry standards for safety and environmental responsibility.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these black-oxide alloy steel flat head screws deliver outstanding durability and strength where it matters most. The 1"-8 UNC coarse thread design provides excellent grip in soft materials and resists loosening under vibration, making them ideal for machinery, structural assemblies, and automotive components. The fully threaded configuration ensures consistent clamping force across varying material depths, while the hex drive allows for high-torque installation without slippage. Built to withstand extreme conditions, these screws address common challenges like corrosion, fatigue, and installation efficiency, offering long-term reliability in demanding engineering environments.
Specification Summary & Compliance
This product features a 1"-8 UNC coarse thread with Class 3A fit for precise dimensional accuracy, ensuring secure and repeatable fastening. Manufactured in compliance with ASTM F835 specifications, it meets rigorous standards for mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, adhering to environmental and safety regulations for industrial use.
