S-90920A115 4-40 x 1" 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
- High-strength performance with 60,000 psi tensile strength to withstand significant mechanical stress
- Reliable thread engagement through full threading and Class 2A thread fit for consistent assembly quality
- Broad industrial compatibility with 4-40 UNC coarse threads and right-hand threading direction
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards
Professional Applications & Engineering Value
These zinc-plated steel flat head screws deliver exceptional engineering value in industrial applications where flush mounting and high-strength fastening are critical. The combination of T8 Torx drive and 4-40 UNC coarse threading addresses common assembly challenges by providing superior torque transmission while minimizing stripping risks. The 82° countersink angle ensures seamless integration into components, eliminating protrusions that could interfere with mechanical operations. With 60,000 psi tensile strength and full threading, these screws maintain integrity under vibration and load stress, making them ideal for machinery, electronic enclosures, and precision equipment where reliability is paramount. The zinc plating provides essential corrosion protection, extending service life in various operational environments.
Specification Summary & Compliance
These flat head screws feature precise Class 2A thread fit according to UNC standards with 1" length in the inch measurement system. Manufacturing compliance includes ASME B18.6.3 specifications for dimensional accuracy and performance. Environmental regulations adherence is confirmed through RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring responsible material usage and environmental safety standards are met.
