S-90279A126 5-40 x 3/8" ASME B18.6.3 Steel Round Head Phillips Screws
Steel Round Head Phillips 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, extending service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical stress
- Rockwell B69 hardness provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit offers consistent, reliable engagement with standard UNC coarse threaded components
- Fully threaded design maximizes grip length and load distribution across the entire fastener
- Phillips No. 2 drive enables efficient installation with common industrial tools while minimizing cam-out
- Compliance with ASME B18.6.3 guarantees dimensional accuracy and interchangeability with industry-standard components
Professional Applications & Engineering Value
These 5-40 UNC zinc-plated steel screws deliver exceptional performance in industrial assembly applications where corrosion resistance and high tensile strength are critical. The combination of Rockwell B69 hardness and 60,000 psi tensile strength ensures these rounded head Phillips screws maintain structural integrity under vibration and dynamic loads. The coarse UNC threading with Class 2A fit provides rapid installation and secure fastening in various materials, while the zinc plating creates a protective barrier against oxidation and environmental degradation. These fully threaded screws are engineered for applications requiring consistent clamping force distribution, making them ideal for machinery, equipment manufacturing, and electronic enclosures where reliability and compliance with industrial standards are paramount.
Specification Summary & Compliance
These screws feature precise 5-40 UNC coarse threads with Class 2A thread fit tolerance, ensuring compatibility with standard mating components. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and performance. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring restricted substance compliance.
