S-94414A108 4-40 x 3/8" 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 and durability with black-oxide alloy steel construction, ideal for harsh industrial environments.
- Superior torque transmission and reduced cam-out using the Torx Plus IP10 drive, ensuring secure fastening and extended tool life.
- High tensile strength of 140,000 psi provides reliable performance under heavy loads and vibration.
- Precise Class 3A thread fit ensures consistent engagement and reduces the risk of cross-threading in assembly lines.
- Full threading and 82° countersink angle allow for flush mounting and even load distribution in countersunk applications.
- Rockwell C39 hardness offers excellent wear resistance, maintaining integrity through repeated use.
- Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations.
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address common industrial challenges such as fastener failure and assembly inefficiency. The black-oxide alloy steel provides a protective layer against rust and wear, extending service life in demanding settings like machinery, automotive, and electronics. The Torx Plus drive (IP10) minimizes slippage, enabling higher torque application without damaging the drive, which is critical for precision equipment. With a coarse thread spacing and Class 3A thread fit, these screws ensure quick, secure installations in materials where vibration resistance is paramount. Fully threaded and featuring an 82° countersink angle, they deliver a smooth, flush finish that enhances structural integrity and aesthetics in countersunk applications, reducing the need for rework and maintenance.
Specification Summary & Compliance
These screws meet precise dimensional standards with a Class 3A thread fit and UNC thread type, ensuring high accuracy and interchangeability. Manufacturing adheres to ASME B18.3 and ASTM F835 specifications, providing consistent quality. They are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free from hazardous substances and suitable for global industrial use.
