S-94209A485 4-40 x 3/8" Tapping Screws
Tapping 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-coated steel construction, extending service life in harsh environments.
- High-torque installation capability via Torx Plus IP10 drive, reducing cam-out and tool wear for efficient assembly.
- Reliable thread-forming performance in soft metals like aluminum, brass, and copper, eliminating the need for pre-tapped holes.
- Enhanced grip and vibration resistance from the Tri-Lobe shank design, preventing loosening under dynamic loads.
- Precise fit and consistent engagement with 4-40 UNC coarse threads and Class 2A tolerances, ensuring secure fastening.
- Broad material compatibility optimized for non-ferrous metals, reducing inventory needs for diverse applications.
- Environmental compliance assurance meeting RoHS 3 and REACH standards, supporting sustainable manufacturing practices.
Professional Applications & Engineering Value
Engineered for demanding thread-forming applications in non-ferrous metals, these 4-40 UNC Tri-Lobe tapping screws address common industrial challenges such as strip-out and corrosion-induced failure. The black corrosion-resistant coated steel material provides lasting protection against oxidation, while the Torx Plus IP10 drive enables high torque transfer without slippage, crucial for automated assembly lines. The Tri-Lobe shank cross-section displaces material efficiently in aluminum, brass, and copper substrates, creating strong, permanent threads that resist vibration loosening. Ideal for electronics enclosures, HVAC components, and marine hardware, these screws deliver reliable performance where precision and durability are paramount.
Specification Summary & Compliance
This No. 4 screw with 3/8" length adheres to UNC coarse thread standards with a thread diameter of 0.112" and right-hand direction. Manufactured to standard tolerances (Length: -0.03" to 0"), it is designed for use with a No. 44 drill bit (0.086" diameter). The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance in global markets.
