S-90279A542 1/4"-20 x 1" 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 for extended service life in demanding environments
- Excellent holding power through fully threaded UNC coarse thread design ensuring secure fastening in various materials
- High tensile strength rating of 60,000 psi provides reliable performance under significant mechanical stress
- Optimized drive engagement with No. 3 Phillips drive for efficient installation and reduced cam-out risk
- Precision thread fit with Class 2A tolerance ensures consistent performance and easy assembly
- Versatile rounded head design offers both aesthetic appeal and practical functionality across multiple applications
- Comprehensive compliance with major industrial standards and environmental regulations for worry-free procurement
Professional Applications & Engineering Value
These zinc-plated steel rounded head Phillips screws deliver exceptional engineering value through their balanced combination of material properties and precision manufacturing. The zinc plating provides essential corrosion protection for industrial environments where moisture or chemical exposure is a concern, while the Rockwell B69 hardness ensures the fastener maintains its structural integrity during installation and throughout its service life. The fully threaded UNC coarse thread design offers superior pull-out resistance in both soft and hard materials, making these 1/4-20 screws ideal for assembly lines, machinery manufacturing, electrical enclosures, and structural applications where vibration resistance and long-term reliability are critical. The rounded head profile with No. 3 Phillips drive facilitates quick installation while maintaining a professional appearance in finished products.
Specification Summary & Compliance
This 1/4-20 x 1" screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent performance. 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, ensuring safe use across various industrial sectors.
