S-90279A289 12-24 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 industrial environments
- Exceptional holding power from fully threaded design and 60,000 psi tensile strength for reliable performance in heavy-duty applications
- Optimized drive engagement with No. 3 Phillips head design for efficient installation and reduced cam-out risk
- Precision thread compatibility with Class 2A UNC coarse threads ensuring consistent fit and vibration resistance
- Enhanced durability with Rockwell B69 hardness rating maintaining structural integrity under repeated stress
- Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
- Versatile rounded head profile providing smooth surface finish and reduced snagging in assembly applications
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws deliver critical performance advantages in industrial fastening applications where corrosion resistance and structural integrity are paramount. The 12-24 UNC coarse thread configuration provides excellent engagement in various materials while resisting vibration-induced loosening. With 60,000 psi tensile strength and Rockwell B69 hardness, these Phillips drive screws maintain clamping force in high-stress assemblies across automotive, machinery, and electrical enclosure applications. The fully threaded design ensures maximum holding power along the entire 3/8" length, while the zinc plating creates a protective barrier against environmental degradation, significantly extending service life in challenging operating conditions.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. The 12-24 UNC coarse thread (0.216" diameter) provides reliable engagement across multiple applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use in regulated industries. The zinc-plated steel construction meets corrosion resistance requirements while maintaining the specified 60,000 psi tensile strength and Rockwell B69 hardness for dependable fastening performance.
