S-90279A128 5-40 x 1/2" 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, ensuring long-term reliability in demanding environments
- High tensile strength of 60,000 psi provides exceptional load-bearing capacity for secure, vibration-resistant fastening
- Rockwell B69 hardness rating delivers excellent durability and resistance to wear during installation and use
- Fully threaded design with UNC coarse threads enables faster installation and superior grip in various materials
- Class 2A thread fit ensures consistent, reliable engagement with standard nuts and threaded holes
- Phillips No. 2 drive offers widespread tool compatibility and efficient torque transfer during assembly
- Rounded head profile provides a finished appearance while minimizing snagging in assembled applications
Professional Applications & Engineering Value
These 5-40 UNC zinc-plated steel rounded head screws deliver exceptional performance in industrial fastening applications where corrosion resistance and mechanical strength are critical. The combination of coarse threading and fully threaded design ensures rapid installation and maximum thread engagement in materials ranging from metal assemblies to industrial equipment. The zinc plating provides essential protection against environmental factors, while the Rockwell B69 hardness maintains structural integrity under repeated stress. Ideal for machinery, electrical enclosures, and manufacturing equipment, these Phillips drive screws offer reliable fastening solutions that withstand vibration and maintain clamp load in demanding industrial environments.
Specification Summary & Compliance
This screw features precision 5-40 UNC coarse threads with Class 2A thread fit tolerances, ensuring consistent performance with standard mating components. Manufactured to meet ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. 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.
