S-90273A546 1/4"-20 x 1 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips 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
- Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
- Precision thread engagement with Class 2A fit and UNC coarse threads ensuring secure fastening and vibration resistance
- Flush mounting capability with standard 82° countersink angle for smooth, professional-looking installations
- Industry-standard compatibility with No. 3 Phillips drive and ASME B18.6.3 specifications for seamless integration
- Full-threaded design providing maximum grip length and superior pull-out resistance
- Regulatory compliance meeting RoHS 3 and REACH requirements for safe, environmentally conscious manufacturing
Professional Applications & Engineering Value
These 1/4-20 UNC flat head Phillips screws deliver critical engineering solutions for industrial assembly challenges. The zinc-plated steel construction provides essential corrosion protection in manufacturing environments, while the coarse thread design ensures rapid installation and superior holding power in wood, plastic, and metal applications. The fully threaded configuration maximizes surface contact for enhanced pull-out resistance, making these industrial screws ideal for machinery assembly, electrical enclosures, and structural frameworks where vibration resistance and long-term reliability are paramount. The standardized 82° countersink angle facilitates flush mounting in pre-drilled applications, eliminating protrusions that could interfere with moving components or create safety hazards.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerances for consistent performance. Features UNC coarse threads (1/4"-20) with right-hand orientation and standard flat head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across various industrial sectors. The zinc-plated steel construction meets specified mechanical properties including 60,000 psi tensile strength and Rockwell B70 hardness for dependable fastening performance.
