S-90920A110 4-40 x 1/2" ASME B18.6.3 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
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Enhanced torque transmission and reduced cam-out with T8 Torx drive for reliable, secure fastening operations
- Flush, professional finish achieved through 82° countersink angle and standard flat head profile
- Excellent holding power with 60,000 psi tensile strength and fully threaded 4-40 UNC coarse thread design
- Precise thread engagement ensured by Class 2A thread fit for consistent performance in assembly applications
- Broad industrial compatibility with right-hand thread direction and 1/2" length for versatile mounting solutions
- Regulatory compliance assurance meeting ASME B18.6.3 standards for quality and reliability
Professional Applications & Engineering Value
These zinc-plated steel flat head screws with T8 Torx drive provide exceptional engineering value in industrial applications where flush mounting and reliable fastening are critical. The combination of 4-40 UNC coarse threading and fully threaded design ensures maximum thread engagement and superior holding power in materials where stripping is a concern. The 82° countersink angle allows for seamless integration into precision assemblies, eliminating protrusions that could interfere with moving components or aesthetic requirements. Engineered for industrial screws applications in machinery, electronics, and equipment manufacturing, these flat head Torx screws deliver consistent performance while the zinc plating provides essential corrosion protection in various operating environments.
Specification Summary & Compliance
These 4-40 UNC screws feature precise Class 2A thread fit tolerances and are manufactured in accordance with ASME B18.6.3 specifications. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet current industry standards for restricted substances. With right-hand thread direction and coarse thread spacing, these screws are designed for reliable performance in industrial fastening applications requiring consistent threading and secure mounting.
