S-90390A149 1/4"-20 x 1" 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 zinc-plated steel construction, ensuring long-lasting performance in demanding industrial environments.
- Enhanced drive stability and torque transmission via the T27 Torx drive, reducing cam-out and tool slippage for reliable fastening.
- Efficient self-tapping installation with thread cutting design, eliminating the need for pre-tapped holes in materials like aluminum, brass, and cast iron.
- Secure flush mounting thanks to the standard flat head profile and 82° countersink angle, providing a smooth, professional finish.
- Robust thread engagement with UNC coarse spacing and full threading, delivering strong holding power and vibration resistance.
- Broad material compatibility for use in sheet metal, aluminum, brass, and cast iron, streamlining inventory for diverse projects.
- Environmental and regulatory compliance with RoHS 3 standards, ensuring safe, sustainable use in global markets.
Professional Applications & Engineering Value
These 1/4-20 zinc-plated steel tapping screws are engineered to address common challenges in metal assembly, such as stripping, corrosion, and inefficient installation. The thread cutting technology and UNC coarse threads enable quick, secure fastening in aluminum, brass, cast iron, and sheet metal, reducing labor time and the risk of material damage. The T27 Torx drive ensures high torque application without slippage, ideal for automated or high-volume production lines. Combined with a zinc-plated finish, these screws offer reliable corrosion resistance, making them suitable for outdoor equipment, automotive components, and industrial machinery where durability and compliance with RoHS regulations are critical.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with standard Class 2A tolerance for precise fit, a flat head with 82° countersink angle, and full threading for consistent performance. It is manufactured from zinc-plated steel and complies with RoHS 3 (2015/863/EU) standards, ensuring adherence to environmental and safety regulations in industrial applications.
