S-94414A124 5-40 x 1/2" ASME B18.3, ASTM F835 Alloy Steel Torx Flat Head Screws
Alloy Steel Torx 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
- Enhanced corrosion resistance with black-oxide coating on alloy steel, ideal for harsh industrial environments
- Superior torque transmission and reduced cam-out with Torx Plus drive (IP10/T10), ensuring secure fastening and tool longevity
- High tensile strength of 140,000 psi and Rockwell C39 hardness for reliable performance under heavy loads
- Precise Class 3A thread fit providing consistent engagement and vibration resistance in machinery
- Standard 82° countersink angle allows for flush mounting, improving aesthetics and safety in assembled products
- Full threading along the 1/2" length offers maximum grip and adjustability in various material thicknesses
- Compliance with ASME B18.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met
Professional Applications & Engineering Value
These 5-40 UNC flat head screws are engineered to address critical challenges in industrial assembly, such as vibration loosening and corrosion. The black-oxide alloy steel construction provides a durable barrier against moisture and chemicals, extending service life in demanding applications like machinery, automotive, and electronics. The Torx Plus drive system (IP10/T10) minimizes tool slippage, enabling higher torque application without damaging the drive, which is essential for repetitive or high-stress fastening tasks. Combined with a Class 3A thread fit and full threading, these screws ensure tight, reliable connections that withstand dynamic loads, reducing maintenance needs and downtime in production environments.
Specification Summary & Compliance
This product features a 5-40 UNC coarse thread with Class 3A fit for precise dimensional accuracy, and is fully threaded for consistent performance. It meets ASME B18.3 specifications (referencing ASTM F835) for flat head screws, ensuring interoperability and reliability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.
